Answer:
Explanation:
so he paid 4% sales tax for the total price of the new car...and it cost him 840 bucks
let x be the total cost of the car...and turn ur percent to a decimal
0.04(x) = 840 ....divide both sides by 0.04
x = 840 / 0.04
x = 21,000.....so the car cost $ 21,000
But the TOTAL cost, including sales tax, is : 21,000 + 840 = $ 21,840 <==