If x+y=4 and y+z=8 and z+x=6, then 2x-y-z=?
Created: 6 years ago |
Updated: 3 years ago
best des
x + y = 4
y + z = 8
z + x = 6
⸫ 2x + 2y + 2z = 4 + 8 + 6
Now 2x + 2y + 2z - 3(y + z) = 4 + 8 + 6 - 3(y + z)
2x - y - z = 4 + 8 + 6 - 3×8 [y + z = 8]
= - 6
Md Azizur Rahman
Founder of Satt
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