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(2x - 1) + (3x + 2) = 21
2x - 1 + 3x + 2 = 21
2x + 3x = 21 + 1 - 2
5x = 20
x = 4
2x + 1 = 2(4) - 1
= 8 - 1
= 7
3x + 2 = 3(4) + 2
= 12 + 2
= 14
Jadi panjang sisinya adalah 7 cm dan 14 cm.
2((2x-1) + (3x+2)) = 42
(2x-1) + (3x+2) =21
5x+ 1 = 21
5x = 20
x =4 cm
Salah satu sisinya yaitu antara (2x-1) atau (3x+2)
jika 2x-1 maka 2 . 4 -1 =7 cm
dan jika 3x+2 maka 3.4 +2 = 14 cm
Jadi panjang sisinya 7 cm dan 14 cm