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-14x+7=4 /-7
-14x= -3 /:(-14)
x=3/14
-14x+6=4
-14x=4-6
-14x=-2 / *-1
14x=2 / : 14
x=2/7
-14x+7=4
-14x=-7+4
-14x=-3/:(-14)
x=³/₁₄ trzy czternaste