Terry earned $90 plus 10% of his sales for a net of $159. How much were his sales?

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Answer 1 · 2018-04-15T18:07:10

#90+0.1xx y= 159#
#0.10 xx y = 159 - 90#
#0.10 xx y = 69#
#y = 690#

First, we start off by subtracting what he earned from his net earnings.

Then, we divide #69 " by " 0.10# (which is the same as #69 xx 10#),
This gives us his total sales of #$690. #

Answer 2 · 2018-04-15T18:09:39

#$690#

Write it as an equation. 10% of a number is the same as 0.1 multiplied by that number

So

#90+0.1s=159#

Solve the equation for #s#

#0.1s=69#
#s=690#