Answer:
a = - 6
Explanation:
Given
- 6(a + 5) + 5a = 12 + 6a ← distribute and simplify left side
- 6a - 30 + 5a = 12 + 6a
- a - 30 = 12 + 6a ( subtract 6a from both sides )
- 7a - 30 = 12 ( add 30 to both sides )
- 7a = 42 ( divide both sides by - 7 )
a = - 6