Question 32: Find x knowing \(3(x-7)(x+5)-(x-1)(3 x+2)=-13\)
\(\begin{array}{r} 3(x-7)(x+5)-(x-1)(3 x+2)=-13\\ 3 x^{2}+15 x-21 x -105-3 x^{2}-2 x+3 x+2=-13 \\ -5 x-103=-13 \\ -5 x=90 \\ x=-18 . \end{array}\ )
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Question 32: Find x knowing \(3(x-7)(x+5)-(x-1)(3 x+2)=-13\)
\(\begin{array}{r} 3(x-7)(x+5)-(x-1)(3 x+2)=-13\\ 3 x^{2}+15 x-21 x -105-3 x^{2}-2 x+3 x+2=-13 \\ -5 x-103=-13 \\ -5 x=90 \\ x=-18 . \end{array}\ )
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