75 (2,4) Пж быстро и срочно

Question

75 (2,4)
Пж быстро и срочно

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Answer 1

(68,37-у)÷6.15=8.2
68,37-у=8.2×6.15
68.37-у=50.43
-у=50.43-68.37
-у=-17.94
у=17.94

Comments

(х+5,7)÷51=2; х+5,7=2×51; х+5,7=102; х=102-5,7; х=96,3