Advertisements
Advertisements
प्रश्न
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
Advertisements
उत्तर
`1/5( x - 2 ) = 1/4( 1 - y )`
⇒ 4( x - 2 ) = 5( 1 - y )
⇒ 4x - 8 = 5 - 5y
⇒ 4x + 5y = 13 .....(1)
26x + 3y = - 4 .....(2)
Multiplying equation no. (1) by 3 and(2) by 5.
12x + 15y = 39 .....(3)
130x + 15y = - 20 .....(4)
Subtracting equation (4) from (3)
12x + 15y = 39
- 130x + 15y = - 20
- - +
- 118 x = 59
x = `-59/118`
x = `-1/2`
From (1)
`4(-1/2)` + 5y = 13
5y = 13 + 2
y = 3
APPEARS IN
संबंधित प्रश्न
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 :
13x+ 11y = 70
11x + 13y = 74
If 2x + y = 23 and 4x - y = 19; find the values of x - 3y and 5y - 2x.
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.
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`
Solve :
`4x + [ x - y ]/8 = 17`
`2y + x - [ 5y + 2 ]/3 = 2`
Solve the following simultaneous equations :
3(2u + v) = 7uv
3(u + 3v) = 11uv
Solve the following simultaneous equations:
13a - 11b = 70
11a - 13b = 74
