I don't get this...
Choose the answer based on the most efficient method as presented in the lesson.

If the first step in the solution of the equation -9 + x = 5x - 7 is "subtract x," then what should the next step be?

Question

I don't get this...
Choose the answer based on the most efficient method as presented in the lesson.

If the first step in the solution of the equation -9 + x = 5x - 7 is "subtract x," then what should the next step be?

anonymous · Answer

do you have choices?

anonymous · Answer

subtract 5x
add 7
add 9

anonymous · Answer

$$-9 + x - x = 5x - x - 7$$
okay so if you did the first step it would be like this

anonymous · Answer

you would end up with$$-9 = 4x - 7$$

anonymous · Answer

now you want to get 7 on the other side so what do you think the step is?

anonymous · Answer

9-7?

anonymous · Answer

close you want to add 7 like this$$-9 + 7 = 4x - 7 + 7$$

anonymous · Answer

so the answer is add 7

anonymous · Answer

Add 7 would be the next step after subtracting x. By subtracting x you now how x on only one side of the equation. To get x alone you need to get rid of the -7 y adding 7 to both sides

anonymous · Answer

Oh! ok! Thank You!