Find y in a system by setting the expressions equal
Set the two expressions for y equal to each other and solve for x. Use x to find y.
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Solve the system: y = 5x + 32 and y = 3x + 20. What is the value of y?
Answer: 2
Solve the system: y = x + 7 and y = −3x − 5. What is the value of y?
Answer: 4
Solve the system: y = −3x − 19 and y = −5x − 29. What is the value of y?
Answer: -4
Tip: Set the two expressions for y equal to each other and solve for x. Use x to find y.
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