Question

Resolver as contas:
1) 5x-12=-3x+7+5

2) 9-x2=-5x+3+2x

3) x+2x-4=1

Preciso urgente!

Answer 1

5x+3x=12+7+5
8x=24
x=24
8
x= 3

2) -2x+5x-2x=3-9-2
x=3-9
x=-6

3) X+2x=1+4
3x=5
x=5
3

eu acho que é assim

Answer 2

1) 5x - 12 = -3x + 7 + 5
5x + 3x = 7 + 5 + 12
8x = 24
x = 24/8
x = 3

2) 9 - 2x = -5x + 3 + 2x
-2x + 5x -2x = 3 - 9
x = -6

3) x + 2x -4 = 1
x + 2x = 1 + 4
3x = 5
x = 5/3
x = 1,6