Hi Brandi
when you have an equation like this you can solve for x by getting values for x on one side of the equation and getting the numbers on the other side
In this case
x + 10 = 4 (we must subtract 10 from both sides to get the numbers on the right side of the equation
x + 10 -10 = 4 - 10
and this becomes
x = -6
so your answer is -6
Hope this helps