Question 1043511
a 7^2x+1=4^x-2
Ambiguous.
Is the exponent of 7 2x?  or 2x+1?
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b. 4^x= 3+18(4^-x)
No algebraic solution.
Use graphical or iterative methods.
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c. 9= log _5(x+100)+6
What does the underscore mean?