Ответ:
180
Пошаговое объяснение:
2( у - 40 - 5 ( у + 8 )) = 12
2 ( у - 40 - 5у - 40) = 12
2у - 80 - 10у - 80 = 12
-8у = 172
у = 180
<span>(X- 8/9)+ 3/8= 19/36
Х-8/9+3/8=19/36
Х- 64/72+27/72=38/72
Х=38/72+64/72-27/72=75/72= 1 3/72=1 1/24.
6 5/27 - (Х- 1 2/9) = 3 20/81
167/27-Х+11/9=263/81
-Х=263/81 - 501/81 - 99/81
-Х= -337/81
Х=324 13/81
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