Persegi panjang=(3x-1) L=(x+5)cm kelilingnya 1m tentukan nilai

1m = 100cm

kll = 100
2 (P + L) = 100
[tex]2 [(3x -1) + (x + 5)] = 100 \\ 2(4x + 4) = 100 \\ 8x + 8 = 100 \\ 8x = 100 - 8 \\ x = \frac{92}{8} \\ x = 11.5[/tex]