The sum of 20.7 and a number is 50.5. Which equation could you use to solve the problem? What should you do to each side of the equation to isolate the variable? What is the solution of the equation?

c

step-by-step explanation:

the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!