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

00

step-by-step explanation:

any options?

step-by-step explanation:

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.