Question

me ajudem!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

Resposta:

1-145

2-10

3-7

4-10

Explicação passo-a-passo:

1-

x=180-35=145

2-

4x=x+30

3x=30

x=10

3-

7x+91+3x+19=180

10x+110=180

10x=70

x=7

4-

10x+20=150-3x

13x=130

x=10