Factorise: (x - 8)( x + 15) = 0
x - 8 = 0 or x + 15 = 0, so x = 8 or -15
Check: 64 + 56 = 120 OK; 225 - 105 = 120 OK
Job done.
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2x+7x-10=4x+3-2x 9x-10=2x+3 7x=13 x=13/7ans
-4x-1-3x-4+5 = -7x-1-2x+1+6 -7x = -9x+6 2x = 6 x = 3
8y-7x
7*x - 5 + 14 = 77*x + 9 = 77*x = -2x = -2/7x equals minus two sevenths
-46 = 3x + 7x