Question

va rog mult dau şi coroana

Answer 1

a) ab+ac= 520 b+c=52 => a(b+c) = 520
a*52=520 => a = 520:52 = 10
b) ab-ac=45 b-c=9 => a(b-c) = 45
a*9= 45 => a = 45:9 => a=5
c) ab+bc+70=170 a=25
ab+bc=170-70=100
a(b+c)=100
25(b+c)=100 =>
b+c=100:25
b+c=4
d)ab-ac-48=2 a=10
ab-ac=2+48=50
a(b-c)=50
10(b-c)=50
b-c=50:10=5