math homework help asap!?

[Mandy M]

example:
a quanity, its 3/4, its 1/3, and its 1/8, added together, become 32.
what is the quanity?
the answer is x= 768/53

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a quanity, its 3/4, its 1/3, and its 1/7, added together, become 71.
what is the quanity?
first to answer with the right answer gets the 10 points

[calmserene]

let the no be "x"

3/4x+ 1/3x+ 1/8x = 32


x( 3/4+ 1/3+ 1/8) = 32

x{( 18+8+3)}/ 24 = 32

x* 29/24 = 32

x= 32*24/29

x= 768/29


2) let the no be " y"

3/4y+1/3y+1/7y = 71

y( 3/4+1/3+ 1/7) = 71

y{( 63+28+12) } /84 = 71

y (103) = 71*84

y= 5964/103 = 57.9

[rossiandree]

lol i dont know