Answer:
x = 15
Step-by-step explanation:
First add 20 to both sides:
[tex]\frac{x}{3} - 20 = -15[/tex]
+ 20 + 20
____________
[tex]\frac{x}{3}[/tex] = 5
The fraction, [tex]\frac{x}{3}[/tex], is really just [tex]\frac{1}{3} x[/tex]:
[tex]\frac{1}{3} x = 5[/tex]
Multiply both sides by 3:
[tex]\frac{1}{3} x = 5[/tex]
x = 15
