Question

In the solution of the equation 5 - 3x = 2x + 9, 3x is added to the equation first. Which of the following should be done next?

add -9
add -5
add -2x

Answer 1

5 - 3x = 2x + 9 + 3x +3x 5 = 5x + 9

Answer 2

so add -9 is the answer

Answer 3

I agree. Add -9.

Answer 4

$$
\large{
5 - 3x = 2x + 9\\
1)~ 5 - 3x+3x = 2x + 9+3x\\
2)~5-9=5x+9-9\\
3)~-4=5x\\
4)x={-4\over 5}
}
$$

Does this make sense?