The solution to the equation 4x + 10 + 3x = 40 - 3x is as follows:
1. Combine like terms on both sides of the equation:
4x + 10 + 3x = 40 - 3x
7x + 10 = 40 - 3x
2. Add 3x to both sides to get all the x terms on one side of the equation:
7x + 10 + 3x = 40 - 3x + 3x
10x + 10 = 40
3. Subtract 10 from both sides to isolate the x term:
10x + 10 - 10 = 40 - 10
10x = 30
4. Divide by 10 on both sides to solve for x:
10x/10 = 30/10
x = 3
Therefore, the solution to the equation is x = 3, which corresponds to option A.