(6х+1)(3х+2)=(9х-1)(2х+5)-3х...

laymverunya @laymverunya

July 2022 1 8 Report

(6х+1)(3х+2)=(9х-1)(2х+5)-3х

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xERISx

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$\big(6x+1\big)\big(3x+2\big)=\big(9x-1\big)\big(2x+5\big)-3x\\\\18x^2+12x+3x+2=18x^2+45x-2x-5-3x\\\\\underline{\underline{18x^2}}+\underline{12x}+\underline{3x}-\underline{\underline{18x^2}}-\underline{45x}+\underline{2x}+\underline{3x}=-5-2\\\\-25x=-7\\\\x=\dfrac7{25}^{~(4}\ \ \ \ \ \ \ \ \ \ \boxed{\boldsymbol{x=0,28}}$

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