Answer:
$1.90
Step-by-step explanation:
5.50+2.6=8.10
10-8.10=1.90
I think the answer to your question
is the last question meaning you add the number up to equal 13.1 and add on the negative so they both equal -13.1
$87
6x12=72
72+15=87
2y >= 5/2
60