Xavier has 20 dollars more than Sara. Their combined money totals $90. Write a system of equations to represent this situation.

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Answered on Sun Feb 27 2022

Let Sara has x dollars

then Xavier has (x+20) dollars.

Total Money = $90

Then, x + (x+20) = 90

x + x + 20 =90

2x + 20 = 90

Transposing 20 to the other side, we get

2x = 90 -20

2x = 70

Dividing 2 from both sides, we get

2x/2 = 70/2

x = 35