Answer:
a=2
Step-by-step explanation:
3a + 3 - 6a = 15
combine like terms: 3a +6a
9a + 3 = 15
add 3 to 15
9a = 18
divide 9 from 18
a = 2
plug it into the equation to check for errors!
3 (2) + 3 - 6 (2) = 15
3 (2) = 6 -6 (2) = -12
6 + 3 - 12 = 15
3 - 12 = 9
9 + 6 = 15
Hope this helps! ❤