Answer:
a = 3
Explanation:
given the equation
2(4a - 1) - (a + 5) = 23 - 3a ← distribute parenthesis on left side and simplify
8a - 2 - a - 5 = 23 - 3a
7a - 7 = 23 - 3a ( add 3a to both sides )
10a - 7 = 23 ( add 7 to both sides )
10a = 30 ( divide both sides by 10 )
a = 3