Answer:
X=25.2
Also
<AFB=7x-18
<RST=72-2x
Step-by-step explanation:
<AFB, and <RST are supplementary then you add them together to equal 180
<AFB=7x-18
<RST=72-2x
Time to make the equation
<AFB+<RST=180 which is known as angle addition postulate
So then you plug the equation in with substitution property of equality
7x-18+72-2x=180
So next is to Combine like terms
5x+54=180
Then the rest is an algebraic equation
Subtract 54 from both sides
5x=126
So then Division prop =
X=25.2
