Answer:
c = โ15.8571428571
Explanation:
-42 = 5(2c + 9) - 3(c + 8)
-42 = 10c + 45 - 3c + 24
-42 = 10c - 3c + 45 + 24
-42 = 7c + 69
-7c -7c
-------------------
-7c - 42 = 69
+42. +42
___________
-7c/-7 = 111/-7
The variable c=9 is the answer the varibles
Isolate the variable by dividing each side by factors that don't contain the variable.
3.5m questions
4.5m answers