how to evaluate ? -7x-3(9-7x) if x=-1
-7x-3(9-7x) if x=-1
-7x -3 (9 - 7 x) if x=-1
= -7*-1 -3*(9 - 7*-1)
= +7 -3*(9 - - 7 )
= 7 -3*(9 + 7 )
= 7 -3* 16
= 7 - 48
= -41