For each expression, use a property to write an equivalent expression. tell which property you used. 10: cd= 11: x+13= 12: 4(2x-3)= 13: 2+(a+b)= 14: draw algebra time models to prove that 4+8x and 4(2x+1) are equivalent.

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.