Question

A student is trying to solve the system of two equations given below:

Equation P: y + z = 6
Equation Q: 8y + 7z = 1

Which of these is a possible step used in eliminating the y-term?

(y + z = 6) ⋅ −8
(y + z = 6) ⋅ 7
(8y + 7z = 1) ⋅ 7
(8y + 7z = 1) ⋅ 8

Answer 1

@pooja195

Answer 2

a

Answer 3

Opposites cancel

Answer 4

so a ?

Answer 5

yes -.-

Answer 6

okay thanks

Answer 7

It's a because you multiply the first equation by -8 which cancels out y

Answer 8

http://www.basic-mathematics.com/elimination-method.html
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