Question

Judi solved the equation 1 – 18 = 43. Her work is shown.
What error did Judi make?

Answer 1

she needed to add instead of subtract to find x so x should be 61

Explanation:

Answer 2

She should have added 18 to 43 rather than subtracted it.

Explanation:

When you are going backwards such as in that problem, you have to do the opposite sign. For example, if it is adding a number, let's say 6, to another number, let's say 4x. So our equation can be 4x + 6 = 18 so I can explain all of the signs.

4x + 6 = 18

- 6 - 6

-----------------

4x = 12

4 times x = 12

/ 4 / 4

x = 3.

I hope this helps for future problems.