Question

Equação de primeiro grau

2x+4-x=2(x+1)

9x-2=7X+4

4X-2X+1=x+1

5x+21=10x-19

2(X-2)-2(X+1)=4

Answer 1

4x-2x+1=x+1
4x-2x-x=-1+1
x=0

9x-2=7x+4
9x-7x=2+4
2x=6
x=$\frac{6}{4}$