Substitution Worksheet With Answer Key - Waynesville R-Vi School District Page 13
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386-2 Substitution
This equation is an identity. So, there are infinitely many solutions.
1 = 2x y
8x
4y = 4
1 = 2x y
8x
4y = 4
First, solve the first equation for y to get 1 + 2x = y. Then substitute 1 + 2x for y in the second equation.
This equation is an identity. So, there are infinitely many solutions.
x = y
1
x + y = 1
x = y
1
x + y = 1
Substitute y
1 for x in the second equation.
Since the left side does not equal the right, there is no solution to this system of equations.
y = 4x + 11
3x + y = 9
y = 4x + 11
3x + y = 9
Substitute 4x + 11 for y in the second equation.
Page 13
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Use the solution for x and either equation to find y.
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