Question

4-5x = 12 + 3x

Answer 1

What do you think the answer is?

Answer 2

I did

4 - 5x - 3x = 12 + 3x - 3x
4 - 2x = 12
4 - 4 - 2x = 12 - 4
2x / 2x = 8/2

x = 4

Answer 3

Should it be negative -2x / -2x?

Answer 4

Okay, lets check that by plugging 4 back into the equation.

4-5(4)=12+3(4)

5*4=20
4-20= -16

-16=13+3(4)

3*4=12
12+13=26

-16=26

So unfortunately, this isnt the right answer.

Answer 5

Lets try starting over.

Answer 6

4-5x=12+3x
+5x +5x

4=12+5x+3x

4 = 12+8x
-12 -12

4-12=8x

4-12= -8

-8=8x
÷8 ÷8

-1=x

Answer 7

Always try getting X on one side of the equation first

Answer 8

And put all of the other numbers onto the other side.

Answer 9

We can check my answer:

4-5(-1)=12+3(-1)

5*-1=-5

4-(-5) is the same thing as 4+5

4+5=9

9=12+3(-1)

3(-1)=-3

12+(-3) is the same thing as 12-3

12-3=9

9=9

So x=-1 is indeed the correct answer.

Answer 10

That makes more sense. Thank you.

Answer 11

No problem.