The three angles below are supplementary. Use the Angle Addition Postulate to solve for x.

x = 19

Step-by-step explanation:

Since they are supplementary, that means they all add up to 180°

So, 5x + 4 + x - 2 + 3x + 7 = 180

Step 1: Add the numbers

5x + 4 + x - 2 + 3x + 7 = 180

5x + 9 + x + 3x = 180

Step 2: Combine like terms

5x + 9 + x + 3x = 180

9x + 9 = 180

Step 3: Subtract 9 from both sides of the equation

9x + 9 = 180

9x + 9 - 9 = 180 - 9

9x = 171

x = 19

Solution:

x = 19

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answer is 67%

step-by-step explanation: