Answer:
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
hope this helps and is right!! p.s. i really need brainliest :)
