Question

Resolva as expressões algébricas abaixo:
a)4x+12=12
b)10x-16-24=50
c)2x+26=12
d)x+40-30=40
e)6x-12+8=24

Answer 1

Resposta:

$a) \: 4x + 12 = 12 \\ 4x = 12 - 12 \\ 4x = 0 \div (4) \\ x = 0$

$b) \: 10x - 16 - 24 = 50 \\ 10x - 40 = 50 \\ 10x = 50 + 40 \\ 10x = 90 \div (10) \\ x = 9$

$c) \: 2x + 26 = 12 \\ 2x = 12 - 26 \\ 2x = - 14 \div (2) \\ x = - 7$

$d) \: x + 40 - 30 = 40 \\ x + 10 = 40 \\ x = 40 - 10 \\ x = 30$

$e) \: 6x - 12 + 8 = 24 \\ 6x - 4 = 24 \\ 6x = 24 + 4 \\ 6x = 28 \div (2) \\ 3x = 14 \\ \\ x = \frac{14}{3}$