Правильный ответ.
x * 709 = 20.353 + 41.330.
x * 709 = 61.683.
x = 61.683 : 709.
x = 87.
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87 * 709 = 30.353 + 41.330.
61.683 = 61.683.
x - 2.020 = 16.800 : 700.
x - 2.020 = 240.
x = 2.020 + 240.
x = 2.260.
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2.260 - 2.020 = 240.
240 = 240.
Удачи ~.