Question

2(4а+3b)-3(2а+6b)= если 6b-а= -1,9

Answer 1

2(4а+3b)-3(2а+6b)
8а+6b-6a-18b
-12b+2a=-3.8

Answer 2

8а+6b-6a-18b=2a-12b=-2 (-a+6b)=-2×(-1,9)=3,8