Verified answer

See if this helps: Rule: When you move a term across an equal sign remember to change its sign from + to a minus or from a - to a +

Solving for y means y must remain by itself on one side of the = sign and be a +y

So if you move -y across the= sign to the right side and change its sign the equation becomes:

2x = 2 + y then move the +2 across the = sign to the left side and change its sign

2x -2 = y solved!

With a little practice you can do this very quickly in your head.

Substitution ability you're taking between the variables in one equation and replace it in the different. Or, y = 3x + 2 in one equation, so which you would be able to easily plug the 3x + 2 into the different equation to remedy for x: 2x + y = 5 is going to 2x + (3x + 2) = 5 2x + 3x + 2 = 5x + 2 = 5 remedy for x: 5x = 5 - 2 = 3 x = 3/5 then you could placed the value you chanced on for x into the two equation to discover y: y = 3x + 2 is going to y = 3 (3/5) + 2. y = 9/5 + 2 y = 9/5 + 10/5 y = 19/5 so... x = 3/5 and y = 19/5

You subtract 2x from both sides, giving you this

-y=2-2x

Then you make everything negative in order to get the y positive, giving you

y=-2+2x

This is as far as you can go because you cannot solve for two variables in the same equation.

2x -y +y = 2+y

2x=2+y

2x-2=y

2x-y-2=2-2 rite? then

2x-y-2=0

2x-y-2+y=y

2x-2=y

so y=2x-2.

y = 2x - 2 ... there's not much else you can do...