7W + 4 - 3W = 15
gather the w's together
4W + 4 = 15
subtract 4 from each side
4W = 11
divide each sides integers by 4
W = 11/4
================checks
depends what 'a' =
-0.5
Y=15/(2c+2x)
8x = 2x + 15 6x = 15 x = 15/6 = 2.5
15+b = 23 Subtract 15 from both sides b = 8
5x+y=-7 3x+y=15 8=D
15 + n = 24 (subtract 15 from both sides) n = 9
(0,7)
solve -3x-3y=-15
4m+15=8m-5 or,4m=20 or,m=5
8x+39 = 2x-15 6x = -54 x = -9
v is -15... -15*2 = -30... -30+11= -19.