Oblicz równanie algebraiczne : 1/5(10x-5)=7 (te 1/5 to jedna piąta :D , mogłem napisać 1/5*10x-5=7 no nie???? plisss Obliczcie ! ;)
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1/5(10x-5)=7
2x - 1 =7
2x=7+1
2x=8
x=4