Question

Solve for x
5x+3=x-7
Will medal and fan

Answer 1

@Mashy

Answer 2

@matt101

Answer 3

You need to isolate x here. What would be your first step?

Answer 4

adding x to both sides

Answer 5

is that correct ? @matt101

Answer 6

Well let's see. If you add x to both sides, you end up with 6x+3=2x-7.

We're not really any closer to isolating x. What can we do to your original equation to get all the x's on the same side?

Answer 7

im not sure

Answer 8

does 6x=-10

Answer 9

and x =-10/6 in fraction form

Answer 10

Close! How did you get rid of the x on the right side?

Answer 11

well I did mathematical operations on both sides

Answer 12

so does x= -10/6 in fraction form

Answer 13

@matt101

Answer 14

You added x to the left, but subtracted it from the right. You need to do the same operation to both sides in order to keep the sides of the equation equal.

In this case, you need to subtract x from both sides. When you do that, you eliminate the x on the right:

\[5x+3=x-7\]\[5x+3-x=x-7-x\]\[4x+3=-7\]
Does that make sense? Can you take it from there?

Answer 15

why is it 4x shouldnt it be 6x

Answer 16

What's 5x-x?

Answer 17

@Here_to_Help15

Answer 18

@sleepyjess

Answer 19

@dan815