8x4=32
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X/8-4=7 X/8=11 X=11 x 8 X=88 ;-)
x+y=12 x-y =4 x=12-4 =8 8+y=12 y=12-8 =4 so x=8 y=4 8+4=12 8-4=4
10
x2 - 12x + 32 = 0 x2 - 8x - 4x +32 = 0 x(x -8) - 4(x -8) = 0 (x - 4)(x - 8) = 0 x = 4 or x = 8
If X = 4 then 2X = 2 x 4, which is 8