Grade 9 · Math
Solve a linear system by elimination practice
Eliminate one variable to solve two simultaneous linear equations.
Opening your practice adventure…
Try a sample
Solve for x: 5x + y = 17, and x + y = 9.
- 1
- 2
- 4
- 3
See the answer & why
2
Subtract the second equation from the first: 4x = 8, so x = 2.
A little hint: Eliminate y by subtracting the two equations.
A teaching tip
Subtract corresponding sides when both equations have the same coefficient for one variable.