# math

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How to complete the following number sentences so that the answer to each is 1.

x/100 + 6/100 +75/100 =1

x/10- 2/10- 4/10 -2/10 = 1

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19/100 + 6/100 +75/100 =1

18/10- 2/10- 4/10 -2/10 = 1

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explain it to me please because I'm confused

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could you work out the problems so i could get a better understanding how to solve x

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x/100 + 6/100 + 75/100 =1

x/100 + 81/100 = 100/100

x/100 = 19/100

x = 19

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x/90 -10/90-4/90-2/90=1

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18/20-6/20+x/20=1

x=20-18+6
x=8

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x/90-10/90-4/90-2/90=1
x/90-6/90-2/90
x/90-4/90=90/90
x=86

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You're on the right track and close. However, you missed -2/90 in the original problem.

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3/19-1/19+7/19+x/19=1
x=19-3+1+7
x=16+8
x=24

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In this problem, 19 is the denominator. When adding and subtracting fractions with the same denominator, only add or subtract the numerators.

http://www.math.com/school/subject1/lessons/S1U4L3GL.html#sm1

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i subtract 6/90-2/90

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thanks a lot

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