no 4
4x-3 = 2x+7
4x-2x = 7+3
2x = 10
x = 5
panjang diagonal = 2x+7
2 (5) + 7 = 17 cm
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no 4
4x-3 = 2x+7
4x-2x = 7+3
2x = 10
x = 5
panjang diagonal = 2x+7
2 (5) + 7 = 17 cm