Question

A) 3(2x-5)=9-2x

B) m-3m+5m=12

C) 8x-9=x+21

Answer 1

a) 3(2x - 5) = 9 - 2x
6x - 15 = 9 - 2x
6x + 2x = 9 + 15
8x = 24
x = 24/8
x = 3

b) m - 3m + 5m = 12
3m = 12
m = 12/3
m = 4

c) 8x - 9 = x + 21
8x - x = 21 + 9
7x = 30
x = 30/7

Answer 2

Olá Ana !
a) 3 ( 2x - 5 ) = 9 - 2x
6x - 15 = 9 - 2x
6x + 2x = 9 + 15
8x = 24
x = 24/8
x = 3
b) m - 3m + 5m = 12
3m = 12
m = 12/3
m = 4
c) 8x - 9 = x + 21
8x - x = 21 + 9
7x = 30
x = 30/7
x = 4,285
Tenha bons estudos !