Question

subistituindo a expressao obtida na equaçao -5x+2y=40 e encontre o valor de x

Answer 1

Resposta:

Valor de X:

-5x = 40 - 2y

-5x/-5 = 40 - 2y/ -5

x = 40 + 2y/ -5

x = 2y/5 -8

Valor de Y:

-5x + 2y = 40

2y = 40 + 5x

2y = 5x + 40

2y/2 = 5x + 40/2

y = 5x + 40/2

y = 5x +2/20