Alexi's restaurant bill is $58, and he wants to leave a 20 percent tip. Which expression represents the total amount that Alexi needs to pay?

The total amount that Alexi needs to pay is the sum of the restaurant bill and the tip he desires to leave. If we let x be this amount, then it is equal to $58 and 20% of this amount. Below is the expression,

x = 58 + (0.20) (58)