SOLUTION: Solve for X and Y X + Y=7 , X + 2Y = 11

Question 236779: Solve for X and Y
X + Y=7 , X + 2Y = 11
Answer by College Student(505) (Show Source): You can put this solution on YOUR website!
To solve by substitution:
1. Leave first equation alone for now.
2. Solve for y on the second equation.
3. Plug in this value into the first eqn to find x
4. Once you know the x value, plug it again in the forst equation to find y.
.
Problem:

so...

now plug into first eqn...

Multiply entire eqn by 2 to eliminate the fraction.

Now combine like terms to solve for x

Now plug this value in the first equation to solve for y.

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