please help! 25 pts.
Match each equation with the operation you can use to solve for the variable.
options:
Subtract 10.
Divide by 10.
Divide by 5.
Subtract 18.
Multiply by 10.
Add 18.
Add 10.
Multiply by 5.

Girardo is using the model below to solve the equation . girardo uses the following steps: step 1 add 4 negative x-tiles to both sides step 2 add 1 negative unit tile to both sides step 3 the solution is which step could be adjusted so that gerardo's final step results in a positive x-value? in step 1, he should have added 4 positive x-tiles to both sides. in step 1, he should have added 3 negative x-tiles to both sides. in step 2, he should have added 4 negative unit tiles to both sides. in step 2, he should have added 1 positive unit tile to both sides.