64х + 8х = 20
72х = 20
х = 5/18.
Ответ:
64x + 8x=20
72x=20
x=20:72
x=0,27
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64х + 8х = 20
72х = 20
х = 5/18.
Ответ:
64x + 8x=20
72x=20
x=20:72
x=0,27