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3(x+2)-x<2(3x+2)
3x+6-x<6x+4
3x-x-6x<4-6
-4x<-2 |:(-4)
x>0,5
b)
x+8/2-4 ≥ x-7
½x+4-4 ≥ x-7
½x-x≥-7
-½x≥ -7 |:(-½)
x≤3,5
c)
2(x-1)/5+2x>3-x/2
2x-2/5+2x>1½-½x
⅖x-⅖+2x>1½-½x
⅖x+2x+½>1½+⅖
⁴₁₀x+2x+⁵₁₀>1⁵₁₀+⁴₁₀
2⁹₁₀x>1⁹₁₀ | :2⁹₁₀
x>¹⁹₁₀x¹⁰₂₉
x>¹⁹₂₉ <---- te to są ułamki jak coś