(English Medium) ICSE Class 9 - CISCE Question Bank Solutions for Mathematics

Find the value of : `[(18.5)^2 - (6.5)^2]/[18.5 + 6.5]`

For solving pair of equation, in this exercise use the method of elimination by equating coefficients :
13 + 2y = 9x
3y = 7x

For solving pair of equation, in this exercise use the method of elimination by equating coefficients :
3x - y = 23
`x/3 + y/4 = 4`

For solving pair of equation, in this exercise use the method of elimination by equating coefficients :
`[5y]/2 - x/3 = 8`

`y/2 + [5x]/3 = 12`

For solving pair of equation, in this exercise use the method of elimination by equating coefficients :
`1/5( x - 2 ) = 1/4( 1 - y )`
26x + 3y + 4 = 0

For solving pair of equation, in this exercise use the method of elimination by equating coefficients:

y = 2x - 6; y = 0

For solving pair of equation, in this exercise use the method of elimination by equating coefficients :
`[ x - y ]/6 = 2( 4 - x )`
2x + y = 3( x - 4 )

For solving pair of equation, in this exercise use the method of elimination by equating coefficients :
3 - (x - 5) = y + 2
2 (x + y) = 4 - 3y

For solving pair of equation, in this exercise use the method of elimination by equating coefficients :
2x − 3y − 3 = 0
`[2x]/3 + 4y + 1/2` = 0

For solving pair of equation, in this exercise use the method of elimination by equating coefficients :
13x+ 11y = 70
11x + 13y = 74

For solving pair of equation, in this exercise use the method of elimination by equating coefficients :
41x + 53y = 135
53x + 41y = 147

If 2x + y = 23 and 4x - y = 19; find the values of x - 3y and 5y - 2x.

If 10y = 7x - 4 and 12x + 18y = 1; find the values of 4x + 6y and 8y - x.

Solve for x and y : 
`[ y + 7 ]/5 = [ 2y - x ]/4 + 3x - 5`

`[ 7 - 5x ]/2 + [ 3 - 4y ]/6 = 5y - 18`

Solve for x and y:

4x = 17 - `[ x - y ]/8`

2y + x = 2 + `[ 5y + 2 ]/3`

Find the value of m, if x = 2, y = 1 is a solution of the equation 2x + 3y = m.

10% of x + 20% of y = 24
3x - y = 20

The value of expression mx - ny is 3 when x = 5 and y = 6. And its value is 8 when x = 6 and y = 5. Find the values of m and n.

Solve :
11(x - 5) + 10(y - 2) + 54 = 0
7(2x - 1) + 9(3y - 1) = 25

Solve :
`[ 7 + x ]/5 - [ 2x - y ]/4 = 3y - 5`

`[5y - 7]/2 + [ 4x - 3 ]/6 = 18 - 5x`