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46=2(3x+2)
46=6x+4
46-4=6x
42=6x
x=42:6=7.
2 ( 2x -1 + x +3 ) = 46
6x +4 = 46
6x = 46 - 4 = 42
x = 42 ÷ 6 = 7
panjang = 2x -1 = 2 × 7 -1 = 14 - 1 = 13
Lebar = x + 3 = 7 + 3 = 10
luas = p×l = 13 × 10 = 130