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The sales tax in Michigan is 6%. Mohammed purchased a computer, including sales tax,for $1,086.50. Find the cost of the computer before sales tax.

Sagot :

Let the cost of the computer be x

6% of x + x = $1,086.50

6x/100 + x = $1,086.50

0.06x + x = $1,086.50

1.06x = $1,086.50

Divide both-side of the equation by 1.06

1.06x /1.06 = $1,086.50/1.06

x = $1025

Therefore the cost of the computer before sale tax = $1025