Answer:
Let \[AB\text{ }=\text{ }3x\text{ }+\text{ }1\] \[BC=-x+2\] \[AC\text{ }=\text{ }4x\text{ }+\text{ }6\] Since, perimeter of \[\Delta ABC\text{ }=\text{ }AB\text{ }+\text{ }BC\text{ }+\text{ }AC\] \[=3x+1+\left( -x+2 \right)+4x+6\] \[=3x+1-x+2+4x+6\] \[=6x+9\]
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