solve b/7-b/8= 4 solve this equation?

0 ⤊

solve b/7-b/8= 4 solve this equation?

28
224
236
4
32

2007-03-04 06:08:50 · 2 answers · asked by George F 1 in Science & Mathematics ➔ Mathematics

2 answers

b/7 - b/8 = 4

56(b/7) - 56(b/8) = 56(4)

8b - 7b = 224

b = 224

Insert the b value into the equation

- - - - - - - - -

b/7 - b/8 = 4

224/7 - 224/8 = 4

32 - 28 = 4

4 = 4

- - - - - - - -s-

2007-03-04 06:40:52 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋

b/7-b/8=4

L.C.M of 7&8 is 56

the eq. arrives at ( 8b-7b)/56=4

b=56*4=224

2007-03-04 14:27:55 · answer #2 · answered by psk 1 · 0⤊ 0⤋