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5x-10 = 3x+18
5x-3x = 18+10
2x = 28
x = 28/2
x = 14
HP = {14}
5x - 10 = 3x + 18
2x = 28 (3x dipindahkan ke ruas sebelah kiri jadi negatif, -10 dipindah ke ruas sebelah kanan jadi positif)
x = 28 : 2
x = 14