2/X+10/(X+8)=(10+2)/(X+16)

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2/X+10/(X+8)=(10+2)/(X+16)
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2/X+10/(X+8)=(10+2)/(X+16)
2/X+10/(X+8)=(10+2)/(X+16)

2/X+10/(X+8)=(10+2)/(X+16)
[2(X+8)+10X]/[X(X+8)]=12/(X+16)
12X+16)(X+16)=12X(X+8)
3X^2+52X+64=3X^2+24X (两边的3X^2可以抵消)
28X=64
X=16/7