Answer:
Step-by-step explanation:
Given
Represent their goal with x
Additional = 18%
Required
Write two expressions to describe the total percentage
The expression is derived using:
This gives:
Solving further (Express percentage as decimal)
7/3
7 is increased by 11 so you decrease it by 11
7-11= -4
3 is decreased by 1 so you increase it by 1
3+1= 4
-4/4
I'd go with the subtraction property of equality:
a = b + c precisely when a - b = c