Equation algebraogram

Solve the equation:

oco + ivo = cita

How much has the task of solutions?

Correct answer:

n =  18

Step-by-step explanation:

$$\begin{gathered} s_1=919+189=1108 \\ {s}_2=919+199=1118 \\ {s}_3=919+289=1208 \\ {s}_4=919+299=1218 \\ {s}_5=919+389=1308 \\ {s}_6=919+399=1318 \\ {s}_7=919+489=1408 \\ {s}_8=919+499=1418 \\ {s}_9=919+589=1508 \\ {s}_{10}=919+599=1518 \\ {s}_{11}=919+689=1608 \\ {s}_{12}=919+699=1618 \\ {s}_{13}=919+789=1708 \\ {s}_{14}=919+799=1718 \\ {s}_{15}=919+889=1808 \\ {s}_{16}=919+899=1818 \\ {s}_{17}=919+989=1908 \\ {s}_{18}=919+999=1918 \\ n=18 \end{gathered}$$

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