Answer:
x + 10
Explanation:
The first step into solving this problem is to add the numbers. So instead of writing (4x + 5 + 2x + 12) - (5x + 7), you can write (4x + 17 + 2x) - (5x + 7) to simplify it and make it less complicated to solve. The next step would be combining the terms. Instead of writing (4x + 17 + 2x) - (5x + 7), you can write (6x + 17) - (5x + 7). Then you would need to distribute, as such, (6x + 17) - 5x + 7. The next thing would be to remove the unnecessary parentheses around your problem. So it should look like this 6x + 17 - 5x - 7. After that, you need to subtract the numbers, which would equal 6x + 10 - 5x. Then you would need to combine the terms again, which would make it 1x + 10. The final step would be to multiply by 1, which would give you your answer, x + 10.