Answer:
Step-by-step explanation:
mx+21/2 = 10 // - 10
x+21/2-10 = 0
x+1/2 = 0 // - 1/2
x = -1/2
B
Jayden & brother went 12 or 13 times
Maria & sister went 12 or 13 times
Your answer is y = 13.75