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

Question

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

Answer 1

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.

 

Answer 2

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

Answer 3

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