Question

3.8a+7.7+ 1.7b +2.5a+11.2+4.6b если a+ b+ 3=10

Answer 1

= 6.3a + 18.9 + 6.3b , а что значит a + b + 3 = 10??

Answer 2

ой

Answer 3

7.3a+7.3b = -11,9. 7,3(ab) = -11,9.

Answer 4

6.3а+6.3b+18.9=6.3(a+b+3)=6.3*10=63