`3,24 xx x - 2,4 xx 0,38 = 21,12`
`3,24 xx x - 0,912 = 21,12`
`3,24 xx x = 21,12 + 0,912`
`3,24 xx x = 22,032`
`x=22.032 : 3.24`
`x=6,8`
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`x xx 37,5 + 62,5 xx x = 184,8 `
`x xx (37,5 + 62,5) = 184,8`
`x xx 100 = 184,5`
`x=184,5 : 100`
`x=1,845`
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`19,5 xx x - x xx 9,5 = 34,87`
`(19,5 - 9,5) xx x = 34,87`
`10 xx x = 34,87`
`x=34,87 : 10`
`x=3,487`
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`#H.J`