Solve for a.

5a-5-15=3a+6+4

a = 15

Step-by-step explanation:

5a - 5 - 15 = 3a + 6 + 4 combine like terms

5a + (-5 - 15) = 3a + (6 + 4)

5a - 20 = 3a + 10 add 20 to both sides

5a = 3a + 30 subtract 3a from both sides

2a = 30 divide both sides by 2

a = 15