Question

Resolva as equações de 1º grau.
A) y – 8 = - 2
B) 10y = 45
C) -5x/4= 10
D) -3x/7= 42

Answer 1

Resposta:

A) y – 8 = - 2 => y=-2+8 => y=6

B) 10y = 45 => y=45/10 => y=4,5

C) -5x/4= 10 => -5x=10.4 => -5x=40 => x=40/(-5) => x=-8

D) -3x/7= 42 => -3x=42.7 => -3x=294 => x=294/(-3) => x=-98

Answer 2

Olá

Bom,

__________

• A) y - 8 = -2

y = -2 + 8

y = 6

R) y = 6

_

• B) 10y = 45

y = 45/10

y = 4,5 ou 9/2

R) 4,5 ou 9/2

_

• C) -5x/4 = 10

-5x = 10 × 4

-5x = 40

x = 40/-5

x = -8

R) x = -8

_

• D) -3x/7 = 42

-3x = 42 × 7

-3x = 298

x = 298/-3

x = -98

R) x = -98

___________

Qualquer dúvida me avise

Ass: MarcosPCV