Question

Xavier has $20 more than Sara. Their combined money totals $90. Write a system of equations, that represents the situation.

Answer 1

x+(x+20)=90 should be the solution. x+20 represents xavier

Answer 2

x= Sara's money
x+$20= Xavier's money

Add their money together to equal $90

EQUATION:
x + (x+$20)= $90

2x + 20= 90
subtract 20 from both sides

2x= 70
divide both sides by 2

x= $35 Sara's money


Xavier's Money
=x+$20
=$35 + $20
=$55


CHECK:
$35 + $55= $90
$90= $90


ANSWER: Sara has $35 and Xavier has $55; Equation: x + (x+20)=90

Hope this helps!  :)