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2(x+7 + x-2) < 50
2(2x+5) < 50
4x + 20 < 50
4x < 50 -20
4x < 30 -----x < 7,5
panjang = x+7 > 7,5 + 7 > 14,5
lebar = x-2 > 7,5 - 2 > 5,5
luas pp = panjang x lebar
luas < 14,5 x 5,5
luas < 79,75