Answer :
2x + 1 = 2A + 3(x + A)
You want x=2 to be a solution.
So the equation will be a true statement when
2(2) + 1 = 2A + 3(2 + A)
4 + 1 = 2A + 6 + 3A
Combine like terms: 5 = 5A + 6
Subtract 6 from each side: -1 = 5A
Divide each side by 5: -0.2 = A