Answer :
Answer:
-9
Step-by-step 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
[tex]\frac{-2x}{-2}[/tex] = [tex]\frac{18}{-2}[/tex]
x = -9
Answer:
x= -9
Step-by-step 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