Answer:
x=9
Step-by-step explanation:
All measurements of the interior angles equals up to 180 degrees when added together, therefore add them all together and set it equal to 180.
7x+2+4x+7+8x=180
-Combine like terms
19x+9=180
-Subtract 9 on both sides
19x=171
-Divide by 19
x=9
I hope this helps you
hotdogs = a
bags of chips= b
-7/5a+3b=14.82
-35a-21b=-103.74
5/7a+6b=22.89
35a+30b=114.45
-35a-21b= -103.74
9b=10.71
b=1.19$