Question

What is the value of y in the system of equations shown below?

7x − 7y = 49
3x − 16y = 34

Answer 1

y=-1

Explanation:

did it

Answer 2

Answer:
`y=-1`

Explanation:

Given the following system of equations:

`\left \{ {{7x - 7y = 49} \atop {3x - 16y = 34}} \right.`

You can use the Substitution Method to find the value of "y".

The procedure is:

1. Solve for "x" from the first equation:

`7x - 7y = 49\\\\7x=49+7y\\\\x=7+y`

2. Substitute this equation into the second equation of the system and solve for "y":

`3x - 16y = 34\\\\3(7+y) - 16y = 34\\\\21+3y-16y=34\\\\-13y=34-21\\\\y=(13)/(-13)\\\\y=-1`