8th Class Mathematics Sample Paper Mathematics Sample Paper - 10

  • question_answer
                       Simplify and solve the following : \[\frac{3t-2}{4}-\frac{2t+3}{3}=\frac{2}{3}-t\]

    Answer:

    \[\frac{3t-2}{4}-\frac{2t+3}{3}=\frac{2}{3}-t\]
    or, \[\frac{3t-2}{4}-\frac{2t+3}{3}+t=\frac{2}{3}\]
    [Transposing t to LHS]
    or,        \[\frac{3(3t-2)-4(2t+3)+12t}{12}=\frac{2}{3}\]                                                                                      
    or,             \[9t-6-8t-12+12t=\frac{2}{3}\times 12\]
    or,                        \[13t-18=8\]
    or,                        \[~13t=8+18\]
    or,                         \[13t=26\]
    or,                         \[t=\frac{26}{13}\,\,or,\,\,t=2\]                                                                                             
    To check
    \[\frac{3t-2}{4}-\frac{2t+3}{3}=\frac{2}{3}-t\]
    or,                     \[\frac{3\times 2-2}{4}-\frac{2\times 2+3}{3}=\frac{2}{3}-2\]
    or,                     \[\frac{6-2}{4}-\frac{4+3}{3}=\frac{2}{3}-2\]
    or,                      \[1-\frac{7}{3}=\frac{2}{3}-2\]
    or,             \[\frac{3-7}{3}=\frac{2-6}{3}\]                         
    or,                     \[\frac{-4}{3}=\frac{-4}{3}\]
    or,                    LHS = RHS        


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