9d+4=76 what is d please answer fast

8

Step-by-step explanation:

9d = 76 -4

9d = 72

d = 72/9

d = 8

A solution is when the two lines intersect, when they have the same (x,y) point.  So we can say y=y which is the same as saying:

2x-15=5x

-3x-15=0

-3x=15

x=-5, now use either to solve for the y coordinate...y=5x becomes:

y=5(-5)=-25 so the solution is the point:

(-5, -25)