Question

Решите уравнение:
(x+6)•(x-1)-(x+3)•(x-4)=5x
${14x}^{2} - (2x - 3) \times (7x + 4) = 14$
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Answer 1

$14x^{2} -(2x-3)*(7x+4)=14\\ 14x^{2}-(14x^{2} +8x-21xx-12)=14\\14x^{2}-(14x^{2}-13x-12)=14\\ 14x^{2} -14x^{2}+13x+12=14\\ 13x+12=14\\ 13x=14-12\\13x=2\\ x=\frac{2}{13}$

$(x+6)*(x-1)-(x+3)*(x-4)=5x\\ x^{2}-x+6x-6-(x^{2}-4x+3x-12)=5x\\ x^{2}-x+6x-6(x^{2}-x-12)=5x\\ x^{2}-x+6x-6-x^{2}+x+12=5x\\ 6x+6=5x\\ 6x-5x=-6\\x=-6$