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x-14,1=2,2 |+14,1
x=16,3
2. x-1⅓ =2,5
x-1⅓ = 2½
x-1²/₆ = 2 ³/₆ |+1²/₆
x=3 ⅚
3. 1,2x=⅘
⁶/₅ x = ⅘ |×⅚
x=⅔
4. ³/₇ x=0,1
³/₇ x = ¹/₁₀ |× ⁷/₃
x= ⁷/₃₀
5. 4011+x=10311 |-4011
x=6300