hope u get it. I've used RHS to prove LHS
75 + 13 + ?? = 140 i dont know what it is.
2 answers:
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Answer:
The answer is A.
Step-by-step explanation:
Lets call f(x)=y, so y= 4*(3*x-5), we want to find 'x', using 'y' as a the variable.
Now lets change the name of 'y' to 'x', and 'x' to f^-1(x).
f-1(x) = (x+20)/12