Xavier (x) has $20 more than Sara (s). Their combined money totals $90. Which system of equations represents this situation? a x


Xavier (x) has $20 more than Sara (s). Their combined money totals $90. Which system of equations represents this situation?
a
x + s = 90 s + x = 20
b
x + s = 90 x – s = 20
c
x – s = 90 s + s = 20
d
s – x = 90 x – s = 20


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