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5,432+x-5-4-32-x=5,391
(32 + (4 x 4 x 4)) / 8 = 12
x2 + 4x - 32 = (x + 8)*(x - 4)
To solve x + x + x + x, set the problem up as multiplication like this 4x = 128. Divide both sides of the problem by 4. You will get x = 32. To check your work, substitute 32 for the x and do the math. 4 x 32 = ?. If the answer is 128, the answer is correct.
-2x2+32 -2(x2-16) -2(x+4)(x-4)