If 3x+2y=8 and 2x-y=3, find the value of 4y-3x = ?
Created: 6 years ago |
Updated: 2 years ago
best des
3x + 2y = 8 - - - - - - - - - (i)
2x - y = 3 - - - - - - - - - - - (ii)
Now, [ (i) + (ii)x2]>>
3x + 2y = 8
4x - 2y = 6
- - - - - - - - - - - - - - - - - -
3x + 4x = 8 + 6
or, 7x = 14
So, x = 14/7 = 2
Now, from (ii)>>
y = 2x - 3 = 2 x 2 - 3 = 1
So, 4y - 3x = 4 x 1 - 3 x 2 = 4 - 6 = - 2
Md Azizur Rahman
Founder of Satt
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