If DE = 3x – 1, EF = 8, and DF = 8x – 21 , find
the value of x.

Nine more than four times a number is the same as one less than twice the number. find the number?

Segment ab is shown on the graph. which shows how to find the x-coordinate of the point that will divide ab into a 2: 3 ratio using the formula

Jeremy wants to determine the number of solutions for the equation below without actually solving the equation. which method should jeremy use?