The quotient of t and 12 is the sum of s and r.

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The quotient of t and 12 is the sum of s and r.

Step 1: The quotient of t and 12 is:
t/12

Step 2: The Sum of s and r is
s + r

Step 3: The word is means equal to, so we set t/12 equal to s + r
t/12 = s + r