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34= 2 (p+l)
34= 2(2x-3+x+2)
34= 2(3x-1)
34= 6x-2
34+2=6x
36=6x
x=6
p=12-3= 9
l= 6+2=8
L=p*l
L= 9*8=72
34 = 2 ( 2x - 3 + x + 2 )
17 = 3x - 1
3x = 17 + 1
3x = 18
x = 6
L = p × l
= ( 2x - 3 ) cm × ( x + 2 ) cm
= 9 cm × 8 cm
= 72 cm²