Ответ:
¹³/60+⁶/60-Х=⁹/60
⁶/60-Х=¹³/60-⁹/60
⁶/60-х=⁴/60
х=⁶/60+⁴/60
х=¹⁰/60
⁵/100+⁸/100+х=²⁰/100
⁸/100+х=²⁰/100-⁵/100
⁸/100+х=¹⁵/100
х=¹⁵/100-⁸/100
х=⁷/100
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Ответ:
¹³/60+⁶/60-Х=⁹/60
⁶/60-Х=¹³/60-⁹/60
⁶/60-х=⁴/60
х=⁶/60+⁴/60
х=¹⁰/60
⁵/100+⁸/100+х=²⁰/100
⁸/100+х=²⁰/100-⁵/100
⁸/100+х=¹⁵/100
х=¹⁵/100-⁸/100
х=⁷/100