Question

Please simplify! x+9=21+3x-4+10

Answer 1

x= -9

Explanation:

- Put all the same signs together

x-3x = 21-4+10-9

*Quick tip:

-when you cross a sign with a number or without a number over the equal

sign you have to change the sign (positive to negative and negative to

positive.

-x and 1x is the same thing

- Calculate small sections by small sections

-2x = 17 + 1

-2x= 18

-2/-2x = 18/-2

x= -9

Answer 2

-9

Explanation:

Step 1 : Put like terms together

x + 9 = 21 + 3x - 4 + 10

Subtract 3x on both sides

-2x + 9 = 21 - 4 + 10

Subtract 9 on both sides

-2x = 21 - 4 + 10 - 9

Simplify

-2x = 18

Step 2 : Divide

`(-2x)/(-2)` =
`(18)/(-2)`

x = -9