Friday

December 19, 2014

December 19, 2014

Posted by **TAMMY** on Friday, April 27, 2007 at 10:00am.

x + y = 4

–x + y = 2

confused where do i start do i need to solve for x and find points

I'll bet that after doing a few like this you would be able to do this one in your head.

just add then up. The x's will cancel and you will have 2y = 6

so dividing by 2 gives y = 3

so mentally replace the y with 3 in the first equation and you are left with

x + 3 = 4

using just good ol' common sense will give you x = 1

**Answer this Question**

**Related Questions**

algebra - i need help with these problems (either a solution or how to plug them...

Algebra 2 - I need help with this problem because I do not have a graphing ...

algebra 1 help - I am having a hard time understanding these problems would some...

Algebra 2 - solve the system of equation by graphing ( find out where they meet...

Univ of Phoenix - Solve the system of equations by graphing. Then classify the ...

i need help on graphing - solve each system by graphing 2x-y=4 5x-y=13

Algebra confused/Thank you - Solve the system by graphing. (If the system is ...

Algebra 2 - 2 questions: 1. Find "a" if (=3,7) is a solution of 2x+ay=26 2. ...

math/algebra - I need help in solving this word problem using linear system ...

algebra - solve by graphing 1.80+.2x=y 2.10+.15x=y solve by graphing 20+20x=y ...