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alright, heres the story. we had some homework assigned on the above subject, on a day i wasnt there. i missed the lesson, needless to say, and now have the weekend to learn it before a pretest. ive got a week to do the homework because i missed the day, but i still have to do the pretest. so, can someone give me a crash course on Solving Equations with Variables on Both Sides?
Ok let's say we have
Then let's try to get the x's and the numbers on different sides. In this case we will subtract the 2x from the left and right and add the 5 to the left and right then we will get our conclusion.
You can always plug that value back into the equation to make sure you got it right.
Here are a few others you can try.
(There's a little bit of a shortcut on this one see if you can notice it)
Quote:
Originally Posted by SnipedYou
Ok let's say we have
Then let's try to get the x's and the numbers on different sides. In this case we will subtract the 2x from the left and right and add the 5 to the left and right then we will get our conclusion.
Here are a few others you can try.
subtract 5x from both sides, leaving 1 = 3x-8..
then add 8 to each side, leaving 9=3x, and divide each side by 3, which is 3=x
subtract 2x from each side, leaving 2x-3 = 1
add 3 to each side, leaving 2x=4
divide each side by 2, x=2.
subtract 11x from both sides..20=2x-10
add 10 to each side..30=2x
divide each side by 2, 15=x
i think i got it, pretty easy..thanks :)
Yup you got it.
Just so you know the shortcut I was getting at. Notice thattherefore x = 1. Its always good to check by solving though.
Ah, was wondering that. cool, now to do the homework...lol