Answer:
x = 15
Explanation:
To solve this problem we want to get the variable "x" on one side by itself.
(Step 1: Re-write equation)
19x - 45 = 240
(Step 2 : add 45 on both sides.)
19x - 45 = 240
+45 +45
--------------------------
19x = 285
(Step 2: Divide 19 on both sides)
19x/19 = 285/19
x = 15
Hope this helps :)