Answer:
The two in the middle are the negatives and the two that are on the sides are positive.
Let's see
126
Step-by-step explanation:
21
x 6
___
5% = 0.05
50 x 0.05 = $2.50
Total tax will be $2.50
Total amount he will pay = 50 + 2.50 = $52.50
x=3
3(2x+5)=4x+21
6x+15=4x+21
-4x -4x
2x+15= 21
-15 -15
2x=6
2 2