How do you solve x plus 3 plus 2x equals x plus 9?
x + 3 + 2x = x + 9
x + 2x + 3 = x + 9
1x - 1x + 2x + 3 = 1x - 1x + 9
1x - 1x + 2x + 3 = 1x - 1x + 9
2x + 3 = 9
2x + 3 - 3 = 9 - 3
2x + 3 - 3 = 9 - 3
2x = 9 -3
2x = 6
2x/2 = 6/2
2x/2 = 6/2
x = 6/2
x = 3