Question

(x-6)(x+7)=(x+3)(x-11)

Answer 1

$(x - 6)(x + 7) = (x + 3)(x - 11) \\ x {}^{2} + 7x - 6x - 42 = x {}^{2} - 11x + 3x - 33 \\ x {}^{2} + x - 42 = x {}^{2} - 8x - 33 \\ x {}^{2} - x {}^{2} + x + 8x = - 33 + 42 \\ 9x = 9 \\ x = 1$

Answer 2

x²+x-42=x²-8x-33
9x=9
x=1
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