Question

5a-3b-8a+12b=
16c+(3c-2)-(5c+7)=
7-3(6y-4)=
Упростить

Answer 1

$5a-3b-8a+12b=5a-8a-3b+12b=-3a+9b=-3(a-3b) \\ \\ 16c+(3c-2)-(5c+7)=16c+3c-2-5c-7=16c+3c-\\-5c-2-7=14c-9\\\\7-3(6y-4)=7-18y+12=-18y+19=19-18y$