If x + y = 6, y + z = 4 and z + x = 2, then 2y - z - x ?
Created: 6 years ago |
Updated: 2 years ago
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If x + y = 6, y + z = 4 and z + x = 2, then 2y - z - x ?
x + y = 6 - - - - - - - (i)
y + z = 4 - - - - - - - (ii)
z + x = 2 - - - - - - - (iii)
[(i) + (ii)]>> 2y + z + x = 10 - - - - - - (iv)
[(iii) x 2]>> 2(z + x) = 4 - - - - - - - - (v)
Now, [(iv) - (v)]>> 2y + z + x - 2(z + x) = 10 - 4
or, 2y + z + x - 2z - 2x = 6
or, 2y - z - x = 6
Md Azizur Rahman
Founder of Satt
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