Question

RESOLVER

2X+X=12

X+3+2X-1=8

2(X-3)-4=3
^ dividido 4

Answer 1

2x+x=12. 2(x-3)-4=3
3x=12. 2x-6-4=3
x=12:3. 2x=3+5+4
x=4. 2x=12
x=12:2
x+3+2x-1=8. x=6
x+2x=8-3+1
3x=5+1
3x=6
x=6:3
x=2