Math, asked by dashingboy1778, 8 months ago

What will be the third number if two numbers are 3/10 and -2/5 if their sum is -1/5

Answers

Answered by Anonymous
22

Given:

  • first no. =  \frac{3}{10}
  • second no. = \frac{ - 2}{5}
  • sum of three no's =  \frac{ - 1}{5}

To find:

  • third number

Answer:

 \longrightarrow first \: no. \:  +  \: second \: no. \:  +  \: third \: no. \:  =   \:  \frac{ - 1}{5}

 \longrightarrow  \frac{3}{10}  +  \frac{ - 2}{5}   +  \:  \frac{? }{?}  =  \frac{ - 1}{5}

Let third no. be x

 \longrightarrow  \frac{ 3}{10}  +  \frac{ - 2}{5}  + x =  \frac{ - 1}{5}

 \longrightarrow  \frac{3 + ( - 4) + 10x}{10}  =  \frac{ - 1}{5}

 \longrightarrow  \frac{3 - 4 + 10x}{10}  =  \frac{ - 1}{5}

 \longrightarrow  - 1 + 10x =  \frac{ - 10}{5}

 \longrightarrow  - 1 + 10x =  - 2

 \longrightarrow 10x =  - 2 + 1

 \longrightarrow 10 x=  - 1

 \longrightarrow x =  \frac{ - 1}{10}

hence ,answer  \sf {\boxed {\pink { </strong><strong>-</strong><strong>1</strong><strong>/</strong><strong>1</strong><strong>0</strong><strong>}}}

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