Pleaseeeee help There was a sample of 200 mg of radioactive substance to start a study. Since then, the sample has decayed by 4.
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Step 1. Simplify 
to 
Step 2. Simplify to 
Step 3. Simplify
to 
Step 4. Cancel
on both sides
Step 5. Multiply both sides by
(the LCM of 
)
Step 6. Expand
Step 7. Subtract
from both sides
Step 8. Simplify
to 
Step 9. Multiply both sides by
Done! :) Hope this helps! :)
Step 2. Simplify
Step 3. Simplify
Step 4. Cancel
Step 5. Multiply both sides by
Step 6. Expand
Step 7. Subtract
Step 8. Simplify
Step 9. Multiply both sides by
Done! :) Hope this helps! :)