the equation is 3x+y=26 x=7

## solve for y then find the value of y for the given value of x

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# 3 Answers

3x+y=27, when x=7

1. Replace any x in the equation with 7.

3(7) + y=27

2. Simplify.

21+y=27

3. Solve for y.

y=27-21

y=6

4. Check your answer by inserting x=7 and y=6 into the original equation.

3(7) +6=27

21+6=27

27=27

Yes, it checks.

To solve the first equation for y, isolate y.

3x + y = 26

Subtract 3x from both sides of the equation.

This leaves:

y = 26 - 3x

Now find the value of y for the corresponding value of x.

y = 26 - 3 (7) = 26 - 21 = 5

Just use the method of substitution . Substitute X =7 in the first equation and solve for y.