Answer:
7.5
Step-by-step explanation:

Answer:
3x=63
Step-by-step explanation:
3 coins means a coin is x and total expenditure is equal to 63
12/3 = x/8
Cross multiply
3x = 96
Eliminate
3x/3 = 96/3
x = 32
Answer:
50
Step-by-step explanation:
Part a: subtract 48-30=18
Part b: i found it by subtracting 48 -30 because it says left over