Question

10-6x=-4x+30
2x=6x+20

Answer 1

10-6x= -4x+30                       
-6x +4x = 30 - 10 ( -1)
6x -4x = -30 + 10
2x= -20
x=-20/2
x -10

2x= 6x + 20
-6x + 2x= 20(-1)
6x -2x = -20
4x= -20
x=-20/4
x=-5

Answer 2

10-6x=-4x+30
-6x+4x=30-10
-2x=20
(-1)×(-2x)=(-1)×20
2x=-20
x=-20/2
x=-10

2x=6x+20
2x-6x=20
-4x=20
(-1)×(-4x)=(-1)×20
4x=-20
x=-20/4
x=-5

Espero ter ajudado!