How can i solve these two expressions

not good in algebra alot :/


1) -5(x+2y)+15(x+2y) x= 7 y= -7

2) 4(2m-n)-3(2m-n) m= -15 n= -18

1.) plug in the values for x and y

-5(7 + 2(-7)) + 15(7 + 2(-7))
-5(7 - 14) + 15(7 - 14)
-5(-7) + 15(-7)
35 - 105

35-105 = -70


hope this helps.
Daniel



2.) plug in values for m and n...

4( 2(-15) - (-18)) - 3 (2(-15) - (-18))

4(-30 + 18) - 3(-30 + 18)
4( -12) - 3(-12)
-48 - (-36)
-48 + 36
= -12