Question

5 x + 42 =67 pfv me ajudem

2 x + 6 = 12

2 x + 60 =72

9 x + 52 = 124

Answer 1

Resposta:

-5x=-25

x=5

2x=-6

x=-3

2x=12

x=6

9x=72

x=8

Answer 2

5x+42=67

5x=67-42

5x=25

x=25÷5

x=5

2x+6=12

2x=12-6

2x=6

x=6÷3

x=2

2x+60=72

2x=72-60

2x=12

x=12÷2

x=6

9x+52=124

9x=124-52

9x= 72

x=72÷9

x=8