Question

A) 3x + 4 = 12-x

B) 4y + 1 = y + 13

C) 2z - 15 = 5 - 2z
com as contas pfvr

Answer 1

Resposta:

A) x = 2

B) y = 4

C) z = 5

Explicação passo a passo:

A)

3x + 4 = 12 - x

3x + x = 12 - 4

4x = 8

x = 8 ÷ 4

x = 2

B)

4y + 1 = y + 13

4y - y = 13 - 1

3y = 12

y = 12 ÷ 3

y = 4

C)

2z - 15 = 5 - 2z

2z + 2z = 5 + 15

4z = 20

z = 20 ÷ 4

z = 5