<PRE><B>Question 757790</B>
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</PRE>