X + 2y = 6
[Pages:2]Solving Systems by Substitution
ex. 1 y = 3 x + 2y = 6
y = 3
x + 2y = 6
Steps to Solving by Substitution
1. Make a table.
2. Put the equation with a solved variable on the left and the equation in standard form on the right.
3. Solve for the first missing variable on the right.
4. Plug the value you found into the equation on the left.
ex. 2 x = 5
y = 3x + 2
x = 5
y = 3x + 2
ex. 3 y = 2x + 5
y = 3x + 10
y = 2x + 5
y = 3x + 10
ex. 4 y = 2x + 5 y = 2x 4
y = 2x + 5
y = 2x 4
ex. 5 y = 3x 7
2x + 4y = 0
y = 3x 7
2x + 4y = 0
ex. 6 x = 10 + 5y
2x 10y = 20
x = 10 + 5y
2x 10y = 20
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