Question

Dau coronița!Ex.7!Dau 15 puncte!

Answer 1

a)a=11; b+c=8
a•b+a•c=
a(b+c)=
11•8=88
b)2•a+3•b+3•c=
2•a+3(b+c)=
2•11+3•8=
22+24=46
c) 10•a+9•b+9•c=
10•a+9(b+c)=
10•8+9•8=
80+72=152

d) a•b+a•c+25=
a(b+c)+25=
11•8+25=
88+25=113
e) a•b+a•c-34=
a(b+c)-34=
11•8-34=
88-34=54
f) 7•b+7•c+9•a=
7(b+c)+9•11=
7•8+9•11=
56+99=155

g) 11•b+11•c-6•a=
11 (b+c)-6•a=
11•8-6•11=
88-66=22

h) 3•a-3•b+3•c=
3•a-3(b+c)=
3•11-3•8=
33-24=9

i) 11•b+a•c=
11•b+11•c=
11 (b+c)=
11•8=88