Please answer. i need help.

17. True (bc anything multiplied by 0 equals 0)

18. True (bc 13=13)

19. True (bc 6=6)

20. True (bc 7(x-3)=7x-21)

21. True (bc the negative sign cancels out the positive sign)

22. True (bc y=3 and 3=y are the same)

23. True (bc they are the same just rearranged)

24. True (because x and z both equal -1)

25. True (anything multiplied by 1 stays the same)

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.

teleportation

step-by-step explanation: