Oblicz równanie : 3+7x=5
7x=5-3
7x=2/7
x=2/7
3=5-7x
3-5=-7x
-2=-7x /:(-7)
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7x=5-3
7x=2/7
x=2/7
3=5-7x
3-5=-7x
-2=-7x /:(-7)
x=2/7