7*(x+y-4)=7х+7у-28
(6a+7b)*14=84а+98b
10*(14x-27y+5)=140x-270y+50
4*(31c-17+54d)=124c-68+216d
7x+7y-28
84a+98b
140x-270y+50
124c-68+216d
7*(x+y-4)=7х+7у-28
(6a+7b)*14=84а+98b
10*(14x-27y+5)=140x-270y+50
4*(31c-17+54d)=124c-68+216d
7x+7y-28
84a+98b
140x-270y+50
124c-68+216d