x+2.x+3.x+4.x+...+29.x=435
Những câu hỏi liên quan
tính bằng cách thuận tiện nhất
5,5+3/4-5+1/4
5/2x2/3+1/4:3/2
tính x ;
435-[ x +16]=425: 17
x x 1/4-3/4=6:3/4
x +2 3/4=5 2/3
5,5 + \(\dfrac{3}{4}\) - 5 + \(\dfrac{1}{4}\)
(5,5 - 5) + (\(\dfrac{3}{4}\) + \(\dfrac{1}{4}\))
= 0,5 + 1
= 1,5
\(\dfrac{5}{2}\) x \(\dfrac{2}{3}\) + \(\dfrac{1}{4}\) : \(\dfrac{3}{2}\)
= \(\dfrac{5}{2}\) x \(\dfrac{2}{3}\) + \(\dfrac{1}{4}\) x \(\dfrac{2}{3}\)
= (\(\dfrac{5}{2}\) + \(\dfrac{1}{4}\)) x \(\dfrac{2}{3}\)
= (\(\dfrac{10}{4}\) + \(\dfrac{1}{4}\)) x \(\dfrac{2}{3}\)
= \(\dfrac{11}{4}\) x \(\dfrac{2}{3}\)
= \(\dfrac{11}{6}\)
Đúng 0
Bình luận (0)
Tính \(x\):
435 - [\(x\) + 16] = 425 : 17
435 - [\(x\) + 16] = 25
[\(x\) + 16] = 435 - 25
\(x\) + 16 = 410
\(x\) = 410 - 16
\(x\) = 394
Đúng 0
Bình luận (0)
\(x\) x \(\dfrac{1}{4}\) - \(\dfrac{3}{4}\) = 6 : \(\dfrac{3}{4}\)
\(x\) \(\times\) \(\dfrac{1}{4}\) - \(\dfrac{3}{4}\) = 6 x \(\dfrac{4}{3}\)
\(x\) x \(\dfrac{1}{4}\) - \(\dfrac{3}{4}\) = 8
\(x\) x \(\dfrac{1}{4}\) = 8 + \(\dfrac{3}{4}\)
\(x\) x \(\dfrac{1}{4}\) = \(\dfrac{32}{4}\) + \(\dfrac{3}{4}\)
\(x\) x \(\dfrac{1}{4}\) = \(\dfrac{35}{4}\)
\(x\) = \(\dfrac{35}{4}\) : \(\dfrac{1}{4}\)
\(x\) = \(\dfrac{35}{4}\) x 4
\(x\) = 35
Đúng 0
Bình luận (0)
Xem thêm câu trả lời
1 tính nhanh . 4 / 3x6 + 4 / 6x3 + 4/ 9 x12 + 4/12x15
2 . tính nhanh : 7/1x5x8 + 7/5x8x12 +7/8x12x12 + ...+ 7/ 32x36x 45
3. tinh nhanh : 328/435 x 438/432 x 435/164 x 432/984 x 164/468
làm được hết mình tặng 5 like
Tìm x thuộc Z, biết: 1. 2 |x - 1| - 5(x + 3) - 2(x-7) |x - 1|- 7x 2. |x - 2| - 5(x - 4) 20 - 5x...
Đọc tiếp
Tìm x thuộc Z, biết: 1. 2 |x - 1| - 5(x + 3) - 2(x-7) = |x - 1|- 7x 2. |x - 2| - 5(x - 4) =20 - 5x 3. 4(x - 2) - 3(x + 4 =(-4)(+3)(-125)(+25)(-8) 4. -3(2x - 4) + 7(x-5) = (-67)(1-301) - 301 . 67 5. 7(x - 5) - 4(x+3) = 2(x - 5)+ (13-135 + 49 ) - (13+49) 6. 5(x-3) - 2(x + 1)= 3 + 2(x-1)+(18 + 29) +( 185 - 18 - 29)
tìm X
435 - ( x +16 ) = 425 : 17
(x + 3/4 ) * 7/4 +7 /6 =5
a) \(435-\left(x+16\right)=425:17\)
\(435-\left(x+16\right)=25\)
\(x+16=435-25\)
\(x+16=410\)
\(x=410-16\)
\(x=394\)
b) \(\left(x+\frac{3}{4}\right)\times\frac{7}{4}+\frac{7}{6}=5\)
\(\left(x+\frac{3}{4}\right)\times\frac{7}{4}=5-\frac{7}{6}\)
\(\left(x+\frac{3}{4}\right)\times\frac{7}{4}=\frac{23}{6}\)
\(x+\frac{3}{4}=\frac{23}{6}:\frac{7}{4}\)
\(x+\frac{3}{4}=\frac{46}{21}\)
\(x=\frac{46}{21}-\frac{3}{4}\)
\(x=\frac{121}{84}\)
Đúng 0
Bình luận (0)
435 - ( x + 16 ) = 425 : 17
435 - ( x + 16 ) = 25
x + 16 = 435 - 25
x + 16 = 410
x = 410 - 16
x = 394
Đúng 0
Bình luận (0)
\(435-\left(x+16\right)=425\div17\)
\(435-\left(x+16\right)=25\)
\(x+16=435-25\)
\(x+16=410\)
\(x=410-16\)
\(x=394\)
\(\left(x+\frac{3}{4}\right)\times\frac{7}{4}+\frac{7}{6}=5\)
\(\left(x+\frac{3}{4}\right)\times\frac{7}{4}=5-\frac{7}{6}\)
\(\left(x\times\frac{3}{4}\right)\times\frac{7}{4}=\frac{23}{6}\)
\(x+\frac{3}{4}=\frac{23}{6}\div\frac{7}{4}\)
\(x\times\frac{3}{4}=\frac{46}{21}\)
\(x=\frac{46}{21}-\frac{3}{4}\)
\(x=\frac{121}{84}\)
\(\)
Đúng 0
Bình luận (0)
Xem thêm câu trả lời
S=1 x 2+2 x 3+3 x 4+.......+28 x 29+29 x 30 =?
bài tìm x
a) 435 - ( x + 16 ) = 425 : 17
b) ( x + 4/3 ) * 7/4 = 5 - 7/6
a) \(435-\left(x+16\right)=425:17\)
\(435-\left(x+16\right)=25\)
\(\Rightarrow x+16=435-25=410\)
\(\Rightarrow x=410-16=394\)
b) \(\left(x+\frac{4}{3}\right)\cdot\frac{7}{4}=5-\frac{7}{6}\)
\(\left(x+\frac{4}{3}\right)\cdot\frac{7}{4}=\frac{23}{6}\)
\(\Rightarrow x+\frac{4}{3}=\frac{23}{6}:\frac{7}{4}=\frac{46}{21}\)
\(\Rightarrow x=\frac{46}{21}-\frac{4}{3}=\frac{6}{7}\)
Ủng hộ mk nka!!!^_^^_^^_^
Đúng 0
Bình luận (0)
a) 435 - ( x + 16 ) = 25
x+ 16 = 435 - 25
x + 16 = 410
x = 410 - 16
x = 394
b) (x+4/3 ) * 7/4 = 23/6
x+4/3= 23/6 : 7/4
x+4/3 = 46/21
x = 46/21 - 4/3
x = 6/7
Đúng 0
Bình luận (0)
435-(x+16)=425:17
435-(x+16)=25
x+16 =435-25
x+16 =410
x =394
b) \(\left(x+\frac{4}{3}\right)\times\frac{7}{4}=5-\frac{7}{6}\)
\(\left(x+\frac{4}{3}\right)\times\frac{7}{4}=\frac{23}{6}\)
\(\left(x+\frac{4}{3}\right)=\frac{23}{6}:\frac{7}{4}\)
\(\left(x+\frac{4}{3}\right)=\frac{46}{21}\)
\(x=\frac{46}{21}-\frac{4}{3}\)
\(x=\frac{6}{7}\)
T mk nha bạn ^...^ !!!
Đúng 0
Bình luận (0)
Xem thêm câu trả lời
tính S = 1 x 2 + 2 x 3 + 3 x 4 +........+ 28 x 29 + 29 x 30
3.( 2.X + 4 ) + 2.( 3.X -3 ) = 4.X + 94
5.( 2.X -1 ) - 3.( 2.X - 2 ) = 2.X +29
a) \(3.\left(2x+4\right)+2.\left(3x-3\right)=4x+94\)
\(\Rightarrow6x+12+6x-6=4x+94\)
\(\Rightarrow\left(6x+6x\right)+\left(12-6\right)=4x+94\)
\(\Rightarrow12x+6=4x+94\)
\(\Rightarrow12x-4x=94-6\)
\(\Rightarrow8x=88\Leftrightarrow x=11\)
b) \(5.\left(2x-1\right)-3.\left(2x-2\right)=2x+29\)
\(\Rightarrow10x-5-6x-6=2x+29\)
\(\Rightarrow\left(10x-6x\right)+\left(-5-6\right)=2x+29\)
\(\Rightarrow4x-11=2x+29\)
\(\Rightarrow4x-2x=29+11\)
\(\Rightarrow2x=30\Leftrightarrow x=15\)
Đúng 0
Bình luận (0)
mk làm lun
1,= 6x+12+5x-6= 4x+94
= 12x +6 = 4x+94
= 8x= 88
x= 11
2,= 10x-5-6x+6= 2x+29
= 4x+1= 2x+29
= 2x= 28
x= 14
Đúng 0
Bình luận (0)
A= [3/2-(x^4-x^4+1/x^2+1)*x^2-x(4*x-1)-4/x^7+6*x^4-x-6]/x^3+29*x+78/3*x^2+12*x-36.rut gon
5 x 4 mũ 15 x 9 mũ 9- 4 x 3 mũ 20 x 8 mũ 9 )/ 5 x 2 mũ 29 x 9 mũ 10 - 7 x 2 mũ 29 x 27 mũ 6Giúp tớ với aa
\(\dfrac{5\cdot4^{15}\cdot9^9-4\cdot3^{20}\cdot8^9}{5\cdot2^{29}\cdot9^{10}-7\cdot2^{29}\cdot27^6}\)
\(=\dfrac{5\cdot2^{30}\cdot3^{18}-2^2\cdot2^{27}\cdot3^{20}}{5\cdot2^{29}\cdot3^{20}-7\cdot2^{29}\cdot3^{18}}\)
\(=\dfrac{2^{29}\cdot3^{18}\left(5\cdot2-3^2\right)}{2^{29}\cdot3^{18}\left(5\cdot3^2-7\right)}\)
\(=\dfrac{10-9}{5\cdot9-7}=\dfrac{1}{38}\)
Đúng 3
Bình luận (0)