What number added to both the numerator and the denominator of 19/37 equals 4/7?

0 ⤊

2007-02-13 03:43:17 · 3 answers · asked by Steph K. 1 in Science & Mathematics ➔ Mathematics

In other words, (19 + x)/(37 + x) = 4/7

Multiply both sides by 7(37 + x):

7(19 + x) = 4(37 + x)

Now, solve:

133 + 7x = 148 + 4x
3x = 15
x = 5

2007-02-13 03:49:21 · answer #1 · answered by Dave 6 · 0⤊ 0⤋

(19+x)/(37+x) = 4/7

7 (19+x) = 4 (37+x)

133 + 7x = 148 + 4x
7x -4x = 148 - 133
3x = 15
x = 15 / 3

x = 5

2007-02-13 11:52:39 · answer #2 · answered by nUssie.. 2 · 0⤊ 0⤋

19+5=24
37+5=42 divide both by 6
you get 4/7
- ta daaaaa....

2007-02-13 11:48:33 · answer #3 · answered by olispora 2 · 0⤊ 0⤋