Wiem że mało ale tyle mi potrzeba:
2,25x-3(i jedna czwarta)=12(i jedna czwarta)
2,25x - 3¼ = 12¼
2,25x = 12,25 + 3,25
2,25x = 15,5 /2,25
x = 15½ : 2¼ = ³¹/₂ : ⁹/₄ = ³¹/₂ * ⁴/₉ = ⁶²/₉ = 6⁸/₉
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2,25x - 3¼ = 12¼
2,25x = 12,25 + 3,25
2,25x = 15,5 /2,25
x = 15½ : 2¼ = ³¹/₂ : ⁹/₄ = ³¹/₂ * ⁴/₉ = ⁶²/₉ = 6⁸/₉