Question

Daca a×b=18,c×a=10 calc.a×(b+c):7si a×(b-c):8

Answer 1

luam a *b+c*a=18+10
a*(b+c)=28




a*b-a*c=18-10
a(b-c)=8

Answer 2

a x(b+c):7
(ab+ac):7
(18+10):7
28:7=4

a x(b-c):8
(ab-ac):8
(18-10):8
8:8=1