Answer:
#9 24 T-Shirts for $168
#10 the diffirence between 30 T-Shirts and 9 T-Shirts is 147
Step-by-step explanation:
so to get the cost (c) for 1 T-Shirt you need to divide 147 by 21
147 ÷ 21 = 7
so c=7
10x7=70
70x3=210
30x7=210
so 30 shirts cost $210
and 9x7=63
so now it is time to do the rest of the math.
210
-63
147
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