Ответ:
Пошаговое объяснение:
5:(16:(3х+1)) = 100-80
5:(16:(3х+1)) = 20
16:(3х+1) = 5/20
16:(3х+1) = 1/4
3х + 1 = 16 : 1/4
3х + 1 = 16*4/1
3х + 1 = 64/1
3х + 1 = 64
3х = 64 - 1
3х = 63
х = 63 : 3
х = 21
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Ответ:
Пошаговое объяснение:
5:(16:(3х+1)) = 100-80
5:(16:(3х+1)) = 20
16:(3х+1) = 5/20
16:(3х+1) = 1/4
3х + 1 = 16 : 1/4
3х + 1 = 16*4/1
3х + 1 = 64/1
3х + 1 = 64
3х = 64 - 1
3х = 63
х = 63 : 3
х = 21