confused

jazziza87

New member
Joined
Apr 2, 2006
Messages
28
need some help,what does it meen when they give you 7+x=y-3, x=2y what is the value of x?
 

stapel

Super Moderator
Staff member
Joined
Feb 4, 2004
Messages
15,943
That means they want you to solve the system of equations for the value of the specified variable.

What method(s) have you learned for solving systems? For instance, since they've only asked for the value of one of the variables, Cramer's Rule could be used.

Thank you.

Eliz.
 

trigstudent

New member
Joined
Mar 31, 2006
Messages
2
hope it helps

You have to plug 2y where x is and solve for y first

7+x=y-3
7+2y=y-3
2y=y-10
2y-y=-10
y=-10

7+x=-10-3
7+x=-13
x=-13-7
x=-20
 
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