|
Question 757790: Substitution:
2x + y = 10
y = 8 - x
Answer by lenny460(1073)   (Show Source):
You can put this solution on YOUR website! Substitution:
2x + y = 10
y = 8 - x
Substitute y = 8 - x into equation (1).
2x + y = 10
2x + (8 - x) = 10
2x + 8 - x = 10
2x - x = x
x + 8 = 10
Subtract 8 from each side of the equation.
x + 8 - 8 = 10 - 8
x = 2
Substitue x = 2 into equation (1).
2x + y = 10
2(2) + y = 10
4 + y = 10
Subtract 4 from each side of the equation.
4 + y - 4 = 10 - 4
y = 6
Check:
y = 8 -x
6 = 8 - 2
6 = 6
Answer:
x = 2 and
y = 6
Lennox Obuong
Algebra Tutor
Nairobi, Kenya
Email: lennoxobuong@yahoo.com
|
|
|
| |
