Question

what is equivalent to -3(3y-2x)+2(5x-4y)

Answer 1

-9y+6x+10x-8y
to expand brackets, you multiply the number outside by the numbers inside. first -3x3= -9. 
-2 by -3 is 6
2 by 5 is 10
2 by -4 is -8

Answer 2

-3(3y-2x)+2(5x-4y)
=-9y+6x+10x-8y
=-17y+16x
=16x-17y