Question

4x/9+x=10/9 simplify! please help! show work! adding and subtracting rationals! pleaseee!

Answer 1

start by multiplying everything by 9
this will get rid of all the denominators
the equation turns into 4x+x=10
5x=10
x=2

Answer 2

can you show me like in a full worked out problem so ican try to do the rest of these please :o?

Answer 3

(2/5)x + (4/5) = 9

how do you get rid of the denominators??

Answer 4

you would multiply everything by 5
(2/5) times 5 = 2
(4/5) times 5 = 4
9 times 5 = 45
2x+4=45
subtract 4 from both sides
then divide both sides by 2
answer: x=20.5

Answer 5

you multiply everything by the LCD of the fractions
LCD = lowest common denominator
for simple problems where all the denominators are the same. the LCD is that denominator
for more complex ones, the LCD is the smallest number that all the denominators are a fraction of
example

if you have (2/3)x + (3/4) = 6
the denominators are 3 and 4 (and the denominator of the 6 is 1, but you dont need to worry about it)
the LCD of 3 and 4 is 12
12 is the smallest number divisible by BOTH 3 and 4
multiply everything by 12 to get rid of denominators

Answer 6

omg thank you!!!!!!! i think i understand!!