Answer:
D. $80
Step-by-step explanation:
kayla equation: 30x+20=y
Sara equation: 35x+10=y
30x+20=35x+10
10=5x
2=x
30(2)+20=$80
35(2)+10=$80
Answer: $80
Kayla:
Lesson fee ($30) + first-time fee ($20) = 50
Another lesson fee will make is $80
Sara:
Lesson fee ($35) + first-time fee ($10) = 45
Another lesson fee will make $80
Answer = 80
