Question

Найди корни уравнения: 3⋅(x+3)=4⋅(x−3)

Answer 1

$3 times (x + 3) = 4 times (x - 3) \ 3 x + 9 = 4x - 12 \ 3x - 4x = - 12 - 9 \ - x = - 21 \ x = 21$