Solve by elimination

(-4,3)

Step-by-step explanation:

sum the equations vertically to eliminate at least one variable

2x= -8

divide both sides by 2

x= -4

substitute the given value of x into the equation

x+y= -1

-4+y= -1

y=3

(-4,3)

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.