How do you solve:?

7y=x+2

4x-8y=12

Thank you!

How do you solve:?

7y=x+2

4x-8y=12

Thank you!

Tutors, sign in to answer this question.

Michael D. | Personable Science TutorPersonable Science Tutor

The way I like to do substitution is by learning the "y" variable first. This means one of the equations must be set to "y=". The second question looks like it will have nicer numbers after isolating "y".

Move y to one side ---> -8y=-4x + 12

Isolate y by dividing -8 from both sides --> y=(1/2)x - 12

Now, you can replace the y in the first equation, 7y=x+2 with (1/2)x - 12 and solve for x. From there, you can then finally solve for y by using the number you got for x by substitution.

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