A music download service charges a flat fee each month and $0.99 per download. The total cost for downloading 27 songs this mont
2 answers:
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Answer:
17
Step-by-step explanation:
What we have to realize is that RS + ST = RT. Since we know the value of all, let's substitute inside the equation.
Now let's try and solve for x by isolating the variable on one side.
Combine like terms:
Subtract 18 from both sides:
Divide both sides by 7:
Now that we know the value of x, we can substitute it back into the equation for RS, .
Hope this helped!