54+x=12+3x
X=21 =number of classes
Total amount she will pay is $75
Step-by-step explanation:
Combing like terms means that you combine the terms that are alike. So, if you have integers you would combine the integers. If you had a variable like x, you would combine everything with x. For instance, 2x+4+3+7x, to combine like terms add 4+3 and 2x+7x.
Y=mx+b, m= slope, b= y intercept, plug in. Y=3x+5
Answer:
31/2
Step-by-step explanation:
Answer:
37
Step-by-step explanation:
You add them to see the new depth
