20=5z-13
z=???

-9+2x=-4
x=

z = 33/5 or 6.6

x = 5/2 or 2.5

Step-by-step explanation:

20 = 5z - 13

Add 13 to both sides.

5z = 33

Divide both sides by 5.

z = 33/5 or 6.6

-9 + 2x = -4

Add 9 to both sides.

2x = 5

Divide both sides by 2.

x = 5/2 or 2.5

a)20+13=5z

33=5z

33/5=z

6.6=z

b)2x=-4+9

2x=5

x=5/2

x=2.5

show us the graphs dude

step-by-step explanation:

answer: i think it is (1,-2)