Question

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

Equation P: x + y = 8
Equation Q: 2x + 5y = 24

Which of the following steps can be used to eliminate the x term? (4 points)

2(x + y = 8)
−2(x + y = 8)
−1(2x + 5y = 24)
−2(2x + 5y = 24)

Answer 1

ima do the problem partially but then if u can figure out the rest good but if not ill help on it.

Answer 2

2x + 2y = 16
(2x + 2y) - (2x + 5y) = 16 - 24 ( modified Equation P minus Equation Q )
2x - 2x + 2y - 5y = 16 - 24

Answer 3

but i beleive first one is your answer.

Answer 4

@Laylalyssa any idea here pls ?

Answer 5

to eliminate x from the first equation by how many need you multiplie the second equation ?

Answer 6

\(\color{#0cbb34}{\text{Originally Posted by}}\) @jhonyy9
to eliminate x from the first equation by how many need you multiplie the second equation ?
\(\color{#0cbb34}{\text{End of Quote}}\)
when add the x terms

Answer 7

@XioGonz

Answer 8

\(\color{#0cbb34}{\text{Originally Posted by}}\) @jhonyy9
\(\color{#0cbb34}{\text{Originally Posted by}}\) @jhonyy9
to eliminate x from the first equation by how many need you multiplie the second equation ?
\(\color{#0cbb34}{\text{End of Quote}}\)
when add the x terms
\(\color{#0cbb34}{\text{End of Quote}}\)
yes and there is no multiplying by -2 but there is multiplying by -4

so

-4(a+b=6) is the answer