about

advice

so, i have this geometry homework thingy... and you have to write what property you use for each step... the question is 5(x - 1) = 4x + 13.... and so the properties i used are distrobution, subtraction and addition.. but i don't know if it's right or not... i got the answer 18... so if any one could i help i would really appriciate it... thanx

Well if you distribute, you should have: 5x-5 = 4x + 13.

You want to get all the variables on one side of the equal side & a number on the other side. In order to do that, you'll subtract 4x (from the right side of the equal sign)..which means you'll also need to subtract the 4x from 5x (on the the left side of the equal sign). That would leave you with the equation: x-5=13. Now what minus 5 equals 13? The answer would be 18. Therfore, x=18. To check your work, just plug in the 18 in place of "x" in your original equation. & both should equal eachother.

5(18)-5=85
4(18)+13=85

So your answer is right because
5(18)-5 = 4(18)+13

Math is hard to explain with just words, but I hope that helped!

[view]

(Rating: 5) thanx!... now i know how to do it instead of guessing
<<< Previous Advice Column
Next Advice Column >>>
humorist-workshop
eXTReMe Tracker