3,8a+7.7+1.7b+2.5a+11.2+4.6b если a+b+3=10

Question

3,8a+7.7+1.7b+2.5a+11.2+4.6b если a+b+3=10

Answer 1

3,8a+7.7+1.7b+2.5a+11.2+4.6b=0.1(63a+63b+189)= 6.3(a+b+3)=6.3*10=63 

Answer 2

(3.8a+2.5a)+ (7.7+11.2)+(1.7b+4.6b)=6.3a+18.9+6.3b=6.3(a+3+b)

если a+b+3=10, то 6.3*10=63