\(\left(3x-2^4\right)\cdot5=370\)
\(3x-16=74\)
\(3x=90\)
\(x=30\)
\(\left(3x-2^4\right).5=370\)
\(3x-16=74\)
\(3x=90\)
\(\Rightarrow x=30\)
Tính nhanh ( Giúp mình nha )
a) -3/7 + 15/26 - ( 2/13 - 3/7 )
b) 2.3/7 + (2/9 -1 3?7 ) -5/3 :1/9
c) -11/23* 6/7 +8/7 * -11/23 - 1/23
d)(377/-231-123/89+ 34/791) * (1/6 -1/8-1/24)
- Kasamita :)))
bai 1 : tinh nhanh :
a) -3/7+ 15/26 - (2/13 - 3/7 ) b) 2.3/7+(2/9-1\(\frac{3}{7}\)) - 5/3 : 1/9 c) -11/23 . 6/7 + 8/7 .-11/23 - 1/23 d) ( 377/231 - 123/89 + 34 /701 ) . ( 1/6 - 1/8 -1 /24)
bai 2 . tim so x biet :
a ) 2/3x - 3/2x = 5/12 b) 2/5 + 3/5 . ( 3x-3,7) = -53/10 c) 7/9:(2+3/4x)+5/9=23/27 d,-2/3.x +1/5=3/10 e, /x/-3/4=5/3
f, /2x-1/3/+5/6=1
bài 1: Tính nhanh
a/ -3/7 + 15 /26 - ( 2/13 - 3/7 )
b/ 2 3/7 + 2/9 - 1 3/7
c/ ( 377 /-231 - 124/89 + 34/791 ) x ( 1/6 - 1/8 - 1/24 )
bài 2: Thực hiện phép tính :
a/ 1/2 x ( 2/9 + 3/ 12 - 5/27 ) b/ ( -5/28 +1,75 + 8/35 ) : -3 9/20
c/ 1/3 x 5/7 - 3/2 x 26/14 d/ 70,5 - 528 : 15/2
Tính nhanh
1) \(2.\frac{3}{7}+\left(\frac{2}{9}-1\frac{3}{7}\right)-\frac{5}{3}:\frac{1}{9}\)
2) \(-\frac{11}{23}.\frac{6}{7}+\frac{8}{7}.\frac{-11}{23}-\frac{1}{23}\)
3) \(\left(\frac{377}{-231}-\frac{123}{89}+\frac{34}{791}\right).\left(\frac{1}{6}-\frac{1}{8}-\frac{1}{24}\right)\)
(377/-231- 123/89 + 34/791) x 1/6 - 1/8 - 1/24. Tính nhanh hộ mình với ạ
Tính nhanh :
\(\frac{-3}{7}+\frac{15}{26}-\left(\frac{2}{13}-\frac{3}{7}\right)\)
\(2.\frac{3}{7}+\left(\frac{2}{9}-1\frac{3}{7}\right)-\frac{5}{3}:\frac{1}{9}\)
\(\frac{-11}{23}.\frac{6}{7}+\frac{8}{7}.\frac{-11}{23}-\frac{1}{23}\)
\(\left(\frac{377}{-231}-\frac{123}{89}+\frac{34}{791}\right).\left(\frac{1}{6}-\frac{1}{8}-\frac{1}{24}\right)\)
a.x/60=-3/4
b. 2/5=12/x
c. x-5/7 =6/21
dx+7/8 =63/24
e x/6=24/x
f .x+5= 4/x+5
g. x+12/x+8=4/3
h. x+9/x+7=9/8
Tinh hop ly gia tri cac bieu thuc sau
a) \(\left(19\frac{5}{8}:\frac{7}{12}-13\frac{1}{2}:\frac{7}{12}\right).\frac{4}{5}\)
b) \(\left(\frac{377}{-231}-\frac{123}{89}+\frac{34}{791}\right).\left(\frac{1}{6}-\frac{1}{8}-\frac{1}{24}\right)\)
Tìm x biết
a) 2.(x-5) = -24
b) 2. (x-5) -7= 13
c) 5.(3-x)+2. (x-7) = -14
d) 12. (x-5)+ 7. (3-x) = 5
e) 30. (x+2) - 6.(x-5) -24.x = 160
