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you wanna get rid of any fractions by multiplying all the terms by their denominators. so the whole equation becomes: -5=15x-9. -15x=-4 15x=4 x=4/15
So -1/3 . - 3/5 = 3/15 The fractions is what gets me. But thank you.
this is so you can cancel the -3 / 5
Ok so you multipy on both sides the -1/3
multiply it with a - 5/ 3
you have -1/3 = x - 3/5 it would be better to multiply it in 1 go and simplify
multiply with reciprocal of -3/5 it would be easier you could do -1/3 reciprocal but it would be more work
So either side is ok? I didn't know that. Thank you!
any other questions?
Yes I have another equation 3x = 2x + 7
since if you multiply for example a equation by -1 you have to do so to both sides you know that right?
No Im so lost right now.
o okies you know what this sign = means right?
equals yes lol
it means is equal to
the equation 3x=2x+7 it reads 3x is equal to 2x plus 7
so do you kinda understand what this is know
how it works
Yes I know we have to combine like terms but when I did it I came up with the wrong answer
I came up with 1x
not like terms but equal amounts just think of it like this you got a 2 ml cups of water A and B they are supposed to be equal if you add 4 pints to cup A Will they still be equal? How will you make them equal? Add 4 pints to cup B right? what is the symbol of adding? its a plus sign + 4 pints
is it more understandable?
a little so do i add the 2x to 3x or am I still off base?
2x = 3x + 7 what would be the easiest method try to make it simpler for you self yes , correct make the like terms dissapear
I did it like this: 3x = 2x + 7 -2x -2x
I know the answer is 7 from looking in the back of the book just can't figure out how to get the answer to 7
additive inverse of 2x is negative 2x do this on both sides
yes I did that
x cannot be negative
how would you get a positive x?
I"m not sure but I think the +3x -2x should egual a positive but that is 5x
umm you sure the problem was 2x = 3x + 7
not - 7
no the problem is 3x =2x + 7
answer is 7 but don't see how to get that answer.
okies here is what i get 3x = 2x +7 (-2 x) 3x = 2x + 7 + (-2x) additive inverse of 2x
can you figure the rest :)
yes thank you