Answer: 9
Explanation:
The first step to solving for x is to write the problem as an equation: 50 + 80 + (6x - 4) = 180 which is known because the sum of all interior angles of a triangle is equal to 180°
Next, simplify the equation. 50 + 80 = 130 which alters the equation to look like this: 130 + (6x - 4) = 180
The next step is to use inverse operations to further simplify the equation. In other words, subtract 130 from either side. 130 - 130 = 0 while 180 - 130 = 50 so now you are left with 6x - 4 = 180
Continue the process by adding 4 to either side of the equation. -4 + 4 = 0 while 50 + 4 = 54. You now have the equation 6x = 54
The final step is to divide either side by 6. 6 ÷ 6 = 0 while 54 ÷ 6 = 9. So you are left with x = 9 as your final result.