Each is twice a square number.
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32
50-18=32
18 + 32 = 50 50 +2 = 52 52 + 2 = 54
x = 50
4X - 32 + 5X + 50 = 180 gather like terms on the left 9X + 18 = 180 subtract 18 from each side 9X = 162 divide both sides by 9 X = 18 -------- check 4(18) - 32 + 5(18) + 50 = 180 72 - 32 + 90 + 50 = 180 40 + 90 + 50 = 180 180 = 180 checks