a)
a+b+c = 49+25= 74
b)
2a+b+c= 2*49+25= 25+ 98= 123
c)
a+ 3b+3c= a+ 3(b+c) = 49+ 3*25=75+49= 124
d)
3a+ 4b+4c= 3a +4(b+c) = 3*49+ 4*25= 100+ 147= 247
e)
5a- 3b-3c = 5a- 3(b+c)= 245- 3*25= 170
f)
a*b+ a*c+2b+2c= a(b+c) +2(b+c) = 49*25+ 2*25= 1225+ 50= 1275
g)
a*c+ a*b -8b-8c= a(b+c)- 8(b+c)= 1225- 200= 1025
h)
6(b+c)- a= 6*25-49=101
i)5b+5c- 2a= 5*25-2*49=27
