Question

Resolva as equações
A.2x+12=20
B.7x+2=2x-8
C.x+2=32-x
Me ajudem pf

Answer 1

Resposta:

a) 2x + 12 = 29

2x = 29 - 12

2x = 17

x = 17/2

b) 7x + 2 = 2x - 8

7x - 2x = -8 - 2

5x = -10

x = -10/5

x = -2

c) x + 2 = 32 - x

x + x = 32 - 2

2x = 30

x = 30/2

x = 15