390,173 views
9 votes
9 votes
Does anyone know the answer for 7 and 8?

Does anyone know the answer for 7 and 8?-example-1
User Yunga Palatino
by
2.7k points

1 Answer

23 votes
23 votes

Answer:

7) A 8) C

Explanation:

number 7 tells us that y=x+1

so we just basically plug it in

2x+3(x+1)=4 Answer: A

to eliminate x's in number 8, we have to multiply one of the equations by -1

let's multiply the second one

4x+3y=6

4x ·-1-y·1=2·-1

4x+3y=6

-4x+y=-2

x's eliminate

4y=4, meaning that the answer is C

User IOrlandoni
by
3.3k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.