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58 = 2 (3x - 2 ) + ( 2x + 1 )
58 = 6x - 4 + 4x + 2
58 = 10x -2
58 + 2 = 10x
60 = 10x
x = 60/10
x = 6
lebar persegi panjang
2(6) + 1
12 + 1
13 jawabannya (C)
58 = 2 ( 3x-2+2x+1)
58 = 2 ( 5x-1)
58 = 10x - 2
58 +2 = 10x
60 = 10x
60/10 = x
6= x
p= 2x+1
2.6+1
12+1
p= 13