Question

1-Resolva as questões
a)X+15=20
b)6x=1320
c)2x-1=x+5
d)2x+10=x+8+10
e)2(x+6)=4(x+2)​

Answer 1

Resposta:

A) 5

B) 220

C) 6

D) 8

E) 2

Explicação passo-a-passo:

$x = 20 - 15 = 5$

$x = \frac{1320}{6} = 220$

$2x - x = 5 + 1 \\ x = 6$

$2x - x = 8 + 10 - 10 \\ x = 8$

$2x + 12 = 4x + 8 \\ 2x - 4x = 8 - 12 \\ - 2x = - 4 \\ x = \frac{ - 4}{2 } = - 2 \\ x = - 2 \times ( - 1) = 2$