a) 8x+2x = 25.22
8x+2x = 25. 4
8x+2x = 100
( 8 + 2) . x = 100
10 . x =100
x =100 :10
x =10
a)x. ( 8+2) = 25.4
X.10 =100
x=100/10
x=10
b) x.( 7-2) = 62 +4
x.5=36+4
x.5=40
x=40/5
x=8
c) x. (6+1) = 52+3
x.7=25+3
x.7=28
x=28/7
x=4
a ) (8 + 2 ) x = 25 * 4
(8 + 2 )x = 100
10 * x = 100
x = 100 / 10
x = 10
a) 8x + 2x = 25 . 22
10x = 25 . 4
10x = 100
x = 100 : 10
x = 10
vậy x = 10
b) 7x - 2x = 617 : 615 + 44 : 11
5x = 62 + 4
5x = 36 + 4
5x = 40
x = 40 : 5
x = 8
vậy x = 8
c) 6x + x = 511 : 59 + 31
7x = 52 + 3
7x = 25 + 3
7x = 28
x = 28 : 7
x = 4
vậy x = 4
k cho mk nha