Medium
Solve the pair of linear equations for x: 1x + 1y = -5 and 2x + -2y = 2.
Explanation
Explanation
Using the elimination method: multiply the first equation by -2 and the second by 1, then subtract to eliminate y. Solving gives x = -2 (and correspondingly y = -3). You can verify: 1(-2) + 1(-3) = -5 ✓ and 2(-2) + -2(-3) = 2 ✓.
PRO TIP
Re-check your working by substituting the answer back into the original question.