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4 votes
1/X 1/4=7/12 solve and check solution

User RussNS
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2 Answers

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1/x+1/4=7/12 , 1/x+3/12=7/12 , 1/x=4/12=1/3 , x=3
User Jgreen
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4 votes

\frac { 1 }{ x } +\frac { 1 }{ 4 } =\frac { 7 }{ 12 } \\ \\ \frac { 1 }{ x } =\frac { 7 }{ 12 } -\frac { 1 }{ 4 }


\\ \\ \frac { 1 }{ x } =\frac { 7 }{ 12 } -\frac { 3 }{ 12 } \\ \\ \frac { 1 }{ x } =\frac { 4 }{ 12 } =\frac { 1 }{ 3 } \\ \\ 3x\cdot \frac { 1 }{ x } =\frac { 1 }{ 3 } \cdot 3x\\ \\ x=3
User Loktar
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8.3k points

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