Question 1104805
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<pre>
Henna + Rina = 300

        Rina = 3*Henna - 100

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Henna + (3*Henna-100) = 300

4*Henna - 100 = 300

4*Henna = 300 + 100  ====>  Henna = {{{400/4}}} = 100.


Then Rina = 300 - 100 = 200.
</pre>

Solved.