Answer: Their combined age will be 90. 2x+x=54 will allow you to find their ages. Solve for x ( this is Timothy's age) and you get 18. Times 2 is 36 for Paul's age. Finally, Timothy will be 36 in 18 years and in 18 years Paul will be 54. Add their ages together and you get 90.
Group and factor group y's with y's and z's with z's (y²-10y)+(10z-yz) factor y(y-10)+z(10-y) force undistribute -1 -y(10-y)+z(10-y) factor (10-y)(-y+z) (z-y)(10-y) or (y-z)(y-10)
