Answer:
x = 21.2
Step-by-step explanation:
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Hey there!
Make the 2% to a decimal which is .02 and multiply it by 57 to find the sales tax
.02*57= 11.4
So 11.4 is the sales tax
So add 11.4 to 57 and you get
$68.40 is the total cost
Hope this helps!
1 month: $3. Second: 3+3(2)=9. Third: 9+6(2)=21. Fourth: 21+12(2)=65. Fifth: 65+24(2)=113. In 5 months he would have saved $113 since he only needs $90 the answer is 5 :)