Left hand side is a string, and "+" is string concatenation as well as addition. So '5' + 3 = '53' (String concatenation). Just as "Hello" + 1 would equal "Hello1". The right hand side is converted to a string.
Left hand side is a string, but "-" is subtraction for numbers. JS converts the '5' to a number, then subtracts. So '5' - 3 = 2 (Numerical subtraction).
That's the explanation, and it's not terribly hard to get past.
Left hand side is a string, and "+" is string concatenation as well as addition. So '5' + 3 = '53' (String concatenation). Just as "Hello" + 1 would equal "Hello1". The right hand side is converted to a string.
Left hand side is a string, but "-" is subtraction for numbers. JS converts the '5' to a number, then subtracts. So '5' - 3 = 2 (Numerical subtraction).
That's the explanation, and it's not terribly hard to get past.