Question

решите уравнения (2у+5)×4=100 ,12×(2х-4)=336

Answer 1

$(2y + 5) times 4 = 100 \ 8y + 20 - 100 = 0 \ 8y - 80 = 0 \ 8y = 80 \ y = 80 div 8 \ y = 10$
$12 times (2x - 4) = 336 \ 24x - 48 - 336 = 0 \ 24x + 384 = 0 \ 24x = - 384 \ x = - 384 div 24 \ x = - 16$