# math

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The upper Angel Falls, the highest waterfall on Earth, is 750m higher than Niagara Falls. If each of the falls were 7m lower, the upper Angel Falls would be 16 times as high as Niagara Falls. How high is each waterfall? Use a chart.

• math -

let the height of NF be x m
then the height of AF is x+750

if NF were 7 m lower ----> x-7
if AF were 7 m lower ----> x+750-7 or x+743

then x+743 = 16(x-7)
x + 743 = 16x - 112
743 + 112 = 16x - x
15x = 855
x = 57
NF is 57 m high, AF is 807 m high.

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