2x-1=x+2..how do you solve?

To solve for x you need to first either subtract x from both sides or add 1 to both sides....I'm going to subtract x from both sides..

Your equation: x - 1=2

now add 1 to both sides:

x=3

Here's the proof, we're going to check it. Since x = 3 we are going to substitute every x with 3 in this equation

2(3) - 1 = 3 + 2

6 - 1 = 3 + 2

5 = 5

so x indeed is 3.

Hope this helped! :]

2x - 1 = x + 2
2x - x = 1 + 2
x = 3

2x - x = 2 + 1
x = 3

2x - 1 = x + 2
2x = x + 3
x = 3

I'll show you how i first learned how to do these. I'll provide you a couple of extra steps that you could try to maybe help you understand a little better.

2x-1=x+2
2x-1+1=x+2+1 (The 2 1s on the left cancel each other)
2x=x+3 (Next, subtract x from 2x, leaving you with 1x)
2x-x=3
x=3

There you go.

2x-1=x+2
x-1=2
x=3

the trick with basic variable questions such as this one is to put your variable (x) alone on one side of the = sign.

2x-1 = x+2

add 1 to both sides making it

2x = x + 3

subtract x from both sides making it x = 3.


Here is another question that illustrates the solving method:


3x + 2 = x - 4

subtract 2 from both sides making your new equation
3x = x -6

now subtract x from both sides making your equation
2x = -6

now divide 2 from both sides to make x alone. Your new equation is x = -6/2 or x = -3.

To solve for x, you have to isolate x on one side.

The first step is to add 1 to both sides. This will cancel the 1 on the left side:
2x=x+2+1

Next, you want to get both x's on the same side, so you'll subtract x from both sides, thus canceling it out on the right side:
2x-x=2+1

From there, it's just simple math:
x=3