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Answer:
and
Step-by-step explanation:
Let
x -----> the number of polyphonic ringtones
y ----> the number of standard ringtones
we know that
-----> equation A
-----> equation B
Solve the system of equations by substitution
Substitute equation A in equation B and solve for y
Find the value of x
Answer:
Step-by-step explanation:
Given the equation
Step 1;
Expand the bracket at the right hand side of the equation to have:
Taking the reciprocal of both sides: