Question

Ex 5 c ) afla suma b+c daca ab +ac +70 =170 si a = 25

Answer 1

b+c=?
a=25;

ab+ac+70=170;
a(b+c)=170-70;
a(b+c)=100;
25(b+c)=100;
b+c=100/25;
b+c=4;