CEMC Pascal

Algebra Difficulty 1.7 Junior Find the answer

If $3+\triangle=5$ and $\triangle+\square=7$ , what is the value of $\triangle+\Delta+\Delta+\square+\square$ ?

Your answer

A number or a short expression. Fractions can be typed as 3/2, and spacing doesn't matter.

Solution

Since $3+\triangle=5$ , then $\triangle=5-3=2$ . Since $\triangle+\square=7$ and $\triangle=2$ , then $\square=5$ . Thus, $\triangle+\Delta+\Delta+\square+\square=3 \times 2+2 \times 5=6+10=16$ .

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