A bag contains three blue marbles, four red marbles, and two green marbles. Two marbles are drawn with replacement. Find the probability of drawing a green
marble, then a red marble.

2(x - 3) + 9 = 3(x + 1) + x

First distribute 2 to both x and -3, and 3 to both x and 1

2(x) = 2x

2(-3) = -6

3(x) = 3x

3(1) = 3

2x - 6 + 9 = 3x + 3 + x

Simplify

2x + 3 = 4x + 3

Isolate the x. Note the equal sign. What you do to one side, you do to the other. Subtract 4x from both sides, and 3 from both sides

2x (-4x) + 3 (-3) = 4x (-4x) + 3 (-3)

2x - 4x = 3 - 3

-2x = 0

Isolate the x, divide -2 from both sides

-2x/-2 = 0/-2

x = 0/-2

x = 0

0 is your answer for x

hope this helps