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4 = 17x
x=4/17
x-9=2x-3
-x = 6
x=-6
6x-2=-3
6x = -1
x=-1/6
21x-3=8-2x
23x = 11
x=11/23
PS Ukośniki to są to kreski ułamkowe.
7-2x=15x+3
-2x-15x=3-7
-17x=-4
x=⁴/₁₇
spr:
7-2x=15x+3
7-2*⁴/₁₇=15*⁴/₁₇+3
7-⁸/₁₇=⁶⁰/₁₇+3
6⁹/₁₇=6⁹/₁₇
2.
x-9=2x-3
x-2x=-3+9
-x=6
x=-6
3.
6x-2=-3
6x=-3+2
6x=-1
x=-⅙
4.
21x-3=8-2x
21x+2x=8+3
23x=11
x=¹¹/₂₃