Math
posted by Mike on .
5x6 = 2x+12
It says x=3 but I don't understand how, can you you explain the steps for me?

5x6 = 2x+12
Combine like terms. Subtract 2x from both sides of the equation.
5x  2x  6 = 12
3x  6 = 12
Add 6 to both sides.
3x = 12 + 6
3x = 18
Divide both sides by 3.
x = 18/3
x = 6
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It looks like x does not equal 3. Let's try substituting 3 for x.
5x6 = 2x+12
(5 * 3)  6 = (2 * 3) + 12
15  6 = 6 + 12
Nope! 3 doesn't work. 
5x6=2x+12
You subtract 12 on both sides of the equal sign
Then you get 5x18=2x
Subtract 5x on both sides
18=3x
Divide by 3 both sides
You get x=6 
Thank You That Is What I Got Also, But The Workbook Said x equaled 3

Im sorry but the books wrong