Hard
Solve the pair of linear equations for x: 5x + 5y = -5 and 3x + -2y = -8.
Explanation
Explanation
Using the elimination method: multiply the first equation by -2 and the second by 5, then subtract to eliminate y. Solving gives x = -2 (and correspondingly y = 1). You can verify: 5(-2) + 5(1) = -5 ✓ and 3(-2) + -2(1) = -8 ✓.
PRO TIP
Re-check your working by substituting the answer back into the original question.