7th Class Mathematics Sample Paper Mathematics Sample Paper - 7

  • question_answer
    (a) Construct 3 equations starting with x = 2
    (b) Construct 3 equations starting with x = -2

    Answer:

    (a)  x = 2
    Multiplying both sides by 5, we get
    5x - 10              ...(i)
    Subtracting 3 from both sides,
    5x - 3 - 10 - 3
    5x - 3 =7                      ..(ii)
    Dividing both sides by 2, we get
    \[\frac{5x}{2}-\frac{3}{2}=~\frac{7}{2}\]          ?(iii)
    (b)    x = -2
    Subtract 2 from both sides,
    x ? 2 = - 2 - 2
    x ? 2 = - 4           ...(i)
    Again,     x = - 2
    Multiplying by 6,
    \[6x=-2\times 6\]
    6x -12
    Subtracting 12 from both sides,
    6x - 12 = - 12 - 12
    6x-12--24           ...(ii)
    Adding 24 to both sides,
    6x - 12 + 24 = - 24 + 24
    6x+12=0          ...(iii)   


You need to login to perform this action.
You will be redirected in 3 sec spinner