Homework Help: Pre Cal

Posted by Kayla on Monday, January 15, 2007 at 7:05pm.

6-x=2x+9

If you are to solve the equation for x, first try to get the variable on one side of the equation.

Let's subtract 2x from both sides to start (whatever operation you do to one side of an equation you must do to the other side as well):

6 - x - 2x = 2x - 2x + 9

6 - 3x = 9

Now let's subtract 6 from both sides:

6 - 6 - 3x = 9 - 6

-3x = 3

Divide both sides by -3 to get x by itself and solve the equation:

-3x/-3 = 3/-3

x = -1

Does this check with the original equation? Substitute -1 for x and see if it checks out. It always helps to check your work!

I hope this will help.

THANK YOU SO MUCH! that helps me alot!

No one has answered this question yet.

Answer this Question

Related Questions

algebra3 - can u solve the equation 1)1.2x= 2.3x-2.2 2)[x-4]= 15 3)[13+2x]= 5 1...
bobpursly,.math - Ok, assume it equals zero. 2x + 3y -6=0 subtract 3y from each ...
correction of math - can someone correct this for me please. Directions: Solve ...
Calculus - A three-sided fence is to be built next to a straight section of a ...
math - x+y= 30 4x+2y=74 y+ What does the y+ signify? Are you supposed to solve ...
pre cal 2 - solve the equation 4cos^2x-1=0
pre-cal: one-to-one property - i am not sure how to do these problems... *use ...
ALGEBRA 1!PLZ HELP! - Use the Substitution method to solve the system of ...
Pre-cal - Sketech the graph of the equation y^2+4y+2x+10=0. Identify the vertex...
How do I do this.?(Math.) - Use the Substitution method to solve the system of ...

For Further Reading

First Name:
School Subject:
Answer: