How do you solve an equation such as

-x+2y=7? i don't understand it at all...

-x+2y=7? i don't understand it at all...

Guest Mar 7, 2014

#1**0 **

-x+2y=7

1) 2y = x + 7

2) y = x/2 + 7/2

Now all you have to do is plug in random numbers for x to find the value of y

1) 2y = x + 7

2) y = x/2 + 7/2

Now all you have to do is plug in random numbers for x to find the value of y

Guest Mar 7, 2014

#2**0 **

To solve this you need __2 equations with __*x* and *y*.

For example you should easy solve something like this, for x:*5x-2=13*.

[list]Let's start: *5x-2=13*[/*:m]

Add 2 to both sides: *5x-2+2=13+2 => 5x=15*[/*:m]

Divide both sides by 5: *5x/5=15/5 => x=3*[/*:m]

That's all![/*:m][/list:u]

Use the same methodology on the equations you want to solve and try to practise by searching on Google!

Dms

For example you should easy solve something like this, for x:

[list]

Use the same methodology on the equations you want to solve and try to practise by searching on Google!

Dms

Dms Mar 7, 2014