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50 = 2(3x + 7 + 2x + 3)
25 = 5x + 10
5x = 15
x = 3
Panjang = 3x + 7 = 3(3) + 7 = 16 cm
Lebar = 2x + 3 = 2(3) + 3 = 9 cm
50 = 2 (3x+7 + 2x+3)
50 = 2( 5x+10)
50 = 10x + 20
-10x = 20 - 50
-10x = -30
x = 3 cm
p = ( 3x + 7 )
= ( 3 × 3 + 7 )
= 16 cm
l = ( 2x +3 )
= ( 2 × 3 + 3 )
= 9 cm