Q = -60 and P ≠ 32 will result in an equation with no solutions. (Both conditions must be met.)
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For Q = -60 and P = 32, there will be an infinite number of solutions. For any other values of Q and P, the solution is
.. x = (32 -P)/(Q +60)
Use Subtraction
1. Subtract
x+2y=7
3x-2y=-3
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4x+0y=4 SIMPLIFY 4x=4
2. DIVIDE
4x=4
x=1
Substitute that into either of the original equations to get x=1, y=3