Question

Me ajudem nessas questões pfvrrrrr
A) 9x-2=4x+18
B) 2x-10+7x+10=180
C) 7y-10=y+50
D) x+6=5

Answer 1

Resposta:

$a)9x - 2 = 4x + 18 = \\9x - 4x = 18 + 2 = \\ 5x = 20 \\ x = 4 \\ \\ b)2x - 10 + 7x + 10 = 180 \\ 9x = 180 \\ x = \frac{180}{9 } = 20 \\ \\ c)7y - 10 = y + 50 = \\ 7y - y = 50 + 10 = \\ 6y = 60 \\ y = 10 \\ \\ d)x + 6 = 5 \\ x = - 1$

Answer 2

Resposta:

A)

$9x - 2 = 4x + 18 \\ 9x - 4x = 18 + 2 \\ 5x = 20 \\ x = \frac{20}{5} \\ x = 4.$

B)

$2x - 10 + 7x + 10 = 180 \\ 2x + 7x = 18 0 + 10 - 10 \\ 9x = 180 \\ x = \frac{180}{9} \\x =20.$

C)

$7y-10=y+50 \\ 7y - y = 50 + 10 \\ 6y = 60 \\ y = \frac{60}{6} \\ y = 10.$

D)

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