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[(6/5x-7/4·9/10-1/5]·5/13=1/2
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Răspuns :

Slavitescudora
[(6/5x-7/3)×9/10-1/5]=1/2×13/5
(6/5x-7/3)×9/10-1/5=13/10
(6/5x-7/3)×9/10=13/10+1/5 amplificãm cu 2 pe 1/5
(6/5x-7/3)×9/10=15/10
6/5x-7/3=15/10×10/9
6/5x-7/3=15/9
6/5x= 15/9+7/3 amplificãm cu 3 pe7/3
6/5x=15+21/9
6/5x=36/9
x=36/9×5/6
x=30/9
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