With inverse functions you just swap 'x' and 'y' and solve for 'y'.
Swap 'x' and 'y':
Add 7 to both sides:
Take the square root of both sides:
Swap 'x' and 'y':
Add 7 to both sides:
Take the square root of both sides:
When 54 is added to a number the result is the same as when the number is multiplied by 3. What is the number? Show working out.
2 answers:
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