Предмет: Алгебра, автор: Garmana

Помогите решить уравнение, желательно подробно.

$x+(x+12)+ frac{5}{7}(x+x+12)=144$

Ответы

Автор ответа: red321

$x+(x+12)+frac{5}{7}(x+x+12)=144\2x+12+frac{5}{7}(2x+12)=144 |*7\7*2x+7*12+7*frac{5}{7}(2x+12)=144*7\12x+84+5(2x+12)=1008\12x+84+10x+60=1008\12x+10x=1008-84-60\24x=864\x=frac{864}{24}\x=36$

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