Answer: 61
Explanation:
Every triangles interior angles adds to equal 180 degrees. With this fact you can set up an algebra equation using the 56, 63, and x variable.
Step 1: ADD the 56 and 63 on the left side of the equation.
56 + 63 + x = 180
Step 2: SUBTRACT 119 from 180 of the right side of the equation.
119 + x = 180
Step 3: AFTER subtracting you should have your answer: 61
x = 61
Step 4: CHECK. Insert your answer in for x back into the original equation. All three numbers should add up to equal 180.
56 + 63 + 61 = 180