Answer:
x = 31
Explanation:
angles formed on a straight line have a sum of 180°
Thus, 4x + 56 = 180
4x + 56 = 180
* subtract 56 from each side *
56 - 56 cancels out
180 - 56 = 124
4x = 124
* divide both sides by 4 *
4x / 4 = x
124 / 4 = 31
we're left with x = 31