3/7^2x-7=3/7^7x-2 rozwiąż równanie
3/7*2x-7=3/7*7x-2 / 3/72x-7=7x-22x-7x=-2+7-5x=5/-5x=-1
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3/7*2x-7=3/7*7x-2 / 3/7
2x-7=7x-2
2x-7x=-2+7
-5x=5/-5
x=-1