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Name________________________________________Date______________8th Grade
Aim
How do we solve systems of equations using substitution?
Warm Up
Substitution
Step 1: Solve any equation for any unknown value.
Step 2: Substitute Step 1 into the other equation.
Step 3: Substitute Step 2’s solution into Step 1.
Step 4: Check your answer.
Solve the system of equations using substitution. Check.
5x – 2y = 22
x + 2y = 2
Group Work Questions
Substitution
Step 1: Solve any equation for any unknown value.
Step 2: Substitute Step 1 into the other equation.
Step 3: Substitute Step 2’s solution into Step 1.
Step 4: Check your answer.
Solve each system of equations using substitution. Check.
1.
y = 6x – 15
y = 2x + 5
2.
x + 2y = 7
x=y–8
3.
x=y
4x – 5y = -2
4.
x+y=7
2x + 3y = 21
5.
3x + 2y = 20
x + 2y = 0
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