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! :)
