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5x - 3 = 2x + 3
5x - 2x = 3 + 3
3x = 6
x = 6/3
x = 2
EF = 5x - 3
= 5(2) - 3
= 10 - 3
= 7 cm
GH = 2x + 3
= 2(2) + 3
= 4 + 3
= 7 cm
jadi kedua panjang sisinya adalah 7 cm
EF = GH
5x-3 = 2x + 3
5x-2x -3 + 3 = 2x - 2x + 3 + 3
3x = 6
3x : 3 = 6 : 3
x = 2
maka sisinya adalah
2x + 3 = 2(2)+ 3 = 4 + 3 = 7 cm
buktikan lagi
5x - 3 = 5(2) - 3 = 10 - 3 = 7 cm