Question

qual valor de x da expressão abaixo


2(2× + 7)+3(3× - 5 ) = 3(4× - 5)- 1​

Answer 1

$\LARGE\tt{}2(2x + 7) + 3(3x - 5) = 3(4x - 5) - 1 \\ \\ \LARGE\tt{}4x + 14 + 3(3x - 5) = 3(4x - 5) - 1 \\ \LARGE\tt{}4x + 14 + 9x - 15 = 3(4x - 5) - 1 \\ \LARGE\tt{}4x + 14 + 9x - 15 = 12x - 15 - 1 \\ \LARGE\tt{}4x + 14 + 9x \: \cancel{ - 15} = 12x \: \cancel{ - 15} - 1 \\ \LARGE\tt{}4x + 14 + 9x = 12x - 1 \\ \LARGE\tt{}13x + 14 = 12x - 1 \\ \LARGE\tt{}13x + 14 - 12x = - 1 \\ \LARGE\tt{}13x - 12x = - 1 - 14 \\ \LARGE\tt{}x = - 1 - 14 \\ {\large\boxed{\boxed{  { \LARGE \tt \red{ x - 15 }}}}}$

Bons estudos!