Question

Eliminate the “z” variable in the last two equations by finding opposite coefficients and adding. What is the resulting equation?

x + 3y + 2z = –16
2x – y + 2z = –15
2x – 2y – z = 1

Answer 1

if u notice. the coefficient of z in the 2nd eq is 2
but in the 3rd eq is -1
so in order for them to be opposite by how much do u have to multipply the 3rd equation?

Answer 2

thnx:)

Answer 3

u r w

Answer 4

tell me what u got