The sum of two numbers is 100. If one of them is 78.67, find the other.​

The sum of two numbers is 100. If one of them is 78.67, find the other.​

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Eliza

1 thought on “The sum of two numbers is 100. If one of them is 78.67, find the other.​”

  1. [tex]\large\sf\underline{Given\::}[/tex]

    • Sum of two numbers = 100

    • One number = 78.67

    [tex]\large\sf\underline{To\:find\::}[/tex]

    • The other number

    [tex]\large\sf\underline{Understanding\:the\:question\::}[/tex]

    In this question , we are given that sum of two numbers result upto 100 . One number is given as 78.67 . We need to find the other number . So in order to solve this question we will assume some unknown value for the number which we need to find . After doing so we will frame up a equation and solve . Let’s begin !

    [tex]\large\sf\underline{Assumption\::}[/tex]

    Let the required number be :

    • x

    [tex]\large\sf\underline{Solution\::}[/tex]

    ◎ [tex]\large{\mathfrak{According\:to\:the\:question:}}[/tex]

    Sum of two numbers = 100

    • Substituting the given value and the assumed value

    [tex]\sf\implies\:x+78.67=100[/tex]

    • Transposing 78.67 in the other side

    [tex]\sf\implies\:x=100-78.67[/tex]

    • Converting the decimal number into fraction form

    [tex]\sf\implies\:x=100-\frac{7867}{100}[/tex]

    • Finding LCM of 1 and 100 in RHS side

    [tex]\sf\implies\:x=\frac{10000-7867}{100}[/tex]

    [tex]\sf\implies\:x=\frac{2133}{100}[/tex]

    • Converting the fraction into decimal form

    [tex]\large{\mathfrak\red{\implies\:x\:=\:21.33}}[/tex]

    ‎ ______________________

    [tex]\large\sf\underline{Verifying\::}[/tex]

    [tex]\sf\:x+78.67=100[/tex]

    • Substituting the value of x

    [tex]\sf\implies\:21.33+78.67=100[/tex]

    • Converting decimal into fraction form

    [tex]\sf\implies\:\frac{2133}{100}+\frac{7867}{100}=100[/tex]

    • LCM of 100

    [tex]\sf\implies\:\frac{10000}{100}=100[/tex]

    [tex]\sf\implies\:\frac{100\cancel{00}}{1\cancel{00}}=100[/tex]

    [tex]\sf\implies\:100=100[/tex]

    [tex]\small\fbox\blue{Hence\:Verified}[/tex]

    [tex]\dag\:\underline{\sf So\:the\:required\:value\:of\:x\:is\:21.33.}[/tex]

    !! Hope it helps !!

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