Replace f(x) with y and proceed to make x the subject:
y=2x-10
y+10=2x
y+10/2=x
Now swap y with x and replace the isolated x with f(x), so
y=2x-10
y+10=2x
y+10/2=x
Now swap y with x and replace the isolated x with f(x), so
How many dessert combinations does Megan have? Just write the number in the space below
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