-2/7x - 5/4x
2007-01-16 06:15:07 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
(-2/7)x - (-5/4)x = -2(4)x/7(4) - 5(7)x/(4)7 = -8x/28 - 35x/28 =
= -43x/28
2007-01-16 06:21:58 · answer #1 · answered by kellenraid 6 · 0⤊ 1⤋
In dealing with fractions, you need to find the Least Common Denominator (LCD) of the denominators 7x and 4x. The LCD is 28x^2.
You should get [( -2)(4x)]/28x^2 - [-5(7x)]/28x^2 , now since both fractions have same denominators you can simply just add them like,
[-8x -35x]/28x^2 or -43x/28x^2
Now cancel or factor one of the x"s and you get a final answer of
-43/28x
2007-01-16 14:31:35 · answer #2 · answered by Aldo 5 · 0⤊ 0⤋
I think you are asking to simplify the equation.
The least common denominator between 7x and 4 x would be 28 x
Therefore, the equation would translate to (-2 x 4) - (5 x 7) / 28x
or -43/28x
2007-01-16 14:24:10 · answer #3 · answered by Chandra 2 · 0⤊ 1⤋
-2/(7x) - 5/(4x) =
(- 8x - 35x)/(28x^2) =
-43/(28x)
-2x/7 - 5x/4 =
(-8x - 35x)/28 =
-43x/28
2007-01-16 14:36:58 · answer #4 · answered by Helmut 7 · 0⤊ 0⤋