x2+2x-63 = 0
When factorised:
(x-7)(x+9) = 0
Therefore: x = 7 or x = -9
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2x + 24 = 9x - 39= 2x + 63 = 9x= 63 = 7x= x = 9
x = 20
(3x - 7)(2x + 9) = 0 x = 7/3 or -9/2
9 + 5x = -4x + 63 9 + 9x = 63 9x = 54 9x/9 = 54/9 x = 6
63 +99 ___ 162