4 * (Х-97) = 68 120: (35-х) = 20 940-2*а=0 620: (с+24) = 10

4x-338=68

4x=338+68

4x=456

(35-x) = 120-20.

(35-x) = 100.

35-x=100

x=35:100

x=0.35.

940-2a=0

-2a=-940

a = (-2) : (-940)

a=470

620: (c+24) = 10

(c+24) = - 620+10

(c+24) = - 610

c+24=-610

c=-610-24

c=634