\(x-\dfrac{7}{6}=\dfrac{3}{2}\left(x-7\right)\Leftrightarrow x-\dfrac{7}{6}=\dfrac{3}{2}x-\dfrac{21}{2}\Leftrightarrow\dfrac{3}{2}x-x=-\dfrac{7}{6}+\dfrac{21}{2}\)
\(\Leftrightarrow\dfrac{1}{2}x=\dfrac{28}{3}\Leftrightarrow x=\dfrac{\dfrac{28}{3}}{\dfrac{1}{2}}=\dfrac{56}{3}\) vậy \(x=\dfrac{56}{3}\)
x+3/15=1/3
-5 .(x+1/5)-1/2.(x-2/3)=3/2x-5/6
x.hỗn số 6 và 2/7 +3/7. hỗn số 2 và 1/5-3/7 =-2
Bài 1: Tìm x , biết:
1) x - 2 = -6 12) 3 . | x - 1 | - 5 = 7
2) -5 . x - ( -3 ) = 13 13) -12 . ( x - 5 ) + 7 . ( 3 - x ) = 5
3) 15 - ( x - 7 ) = -21 14) ( x - 2 ) . ( x + 4 ) = 0
4) 3 .x + 17 = 2 15) ( x - 2 ) . ( x + 15 ) = 0
5) 45 - ( x - 9 ) = -35 16) ( 7 - x ) . ( x + 19 ) = 0
6) ( -5 ) + x = 15 17) -5 < x < 1
7) 2 . x - ( -17 ) = 15 18) | x | < 3
8) | x - 2 | = 3 19) ( x - 3 ) . ( x - 5 ) < 0
9) | x - 3 | - 7 = 13 20) 2 . x2 - 3 = 29
10) 72 - 3 . | x + 1 | = 9 21) -6 . x - ( -7) = 25
11) 17 - ( 43 - | x | ) = 45 22) 46 =- ( x - 11 ) = -48
Tìm x biết:
a) ( x - 1/2) x 5/3 = 7/4 - 1/2
b) ( x - 4/3) x 7/4 = 5 - 7/6
Tính giá trị của biểu thức sau bằng cách hợp lí:
7+7^10 x 2^20 x 3^6 - 2^19 x 6^15 / 9 x 6^19 x 2^9 - 4 x 3^17 x 2^26
Tìm x : |x|-38/7*|x|-3/4=2|x|+(-8/7)
x*13/4+(-7/6)*x-5/3=5/12
93/17:x+(-4/17):x+22/7:52/3=4/11
Tìm số nguyên x, biết:
a, x - 32 + 11 = 21 - 33 + 7
b, -2.(x+6) + 6. ( x-10)= 8
c, 7 . x .( 2 + x ) - 7 . x .( x+3) = 14
d, -4 . ( 2x+9) - (-8+3) -( x + 13 ) = 0
e, / 2x - 1 / = 15
tìm x:
a)\(\left(x+\dfrac{1}{2}\right).\left(\dfrac{2}{3}-2x\right)=0\)
b) \(\left(x.6\dfrac{2}{7}+\dfrac{3}{7}\right).2\dfrac{1}{5}-\dfrac{3}{7}=-2\)
c) \(x.3\dfrac{1}{4}+\left(\dfrac{-7}{6}\right).x-1\dfrac{2}{3}=\dfrac{5}{12}\)
d) \(5\dfrac{8}{17}:x+\left(-\dfrac{4}{17}\right):x+3\dfrac{1}{7}:17\dfrac{1}{3}=\dfrac{4}{11}\)
tìm x
a) 7/18 . x - 2/3 = 5/18
b) 4/9 - 7/8 . x = -2/3
c) 1/6 + -5/7 : -7/18
/ là phần nha
tìm x:
\(\left(x.6\dfrac{2}{7}+\dfrac{3}{7}\right).2\dfrac{1}{5}-\dfrac{3}{7}=-2\)
