Question

A) -9x+13=-58
-9x=-58-13
-9x=-71.(-1)
9x=71
x=9

b) -2x+2+3x=4+3x
-2x+3x-3x=4-2
.-2x=2.(-1)
2x=-2
x=-2/2
x=-1

c) 3x-2+5-x=0
3x-x=-5+2
2x=-3
x=-3/2

Answer 1

a) -9x+13=-58
-9x=-58-13
-9x=-71.(-1)
9x=71
x= 71 /9

As outras estão certas