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Systems by substitution — Homework
Solve each system by substitution. Show the substitution step, both coordinates of the solution, and one check.
- 1.Solve: y = x + 5 and y = 2x + 1
- 2.Solve: y = 3x - 4 and y = x + 2
- 3.Solve: y = 4x and y = 2x + 10
- 4.Solve the system y = 2x + 3 and x + y = 15. Show your substitution.
- 5.Explain why substitution and graphing (from last week) should always give the same solution to a system, even though the methods look completely different.
🌲 Homeschool of the FutureEighth Grade · Math · week 15 homework