step 1: solve wha'ts in "P(parentheses)": 15+3-2(1)
step 2:there are no "E(exponents)" so go to "M(multiplication)": 15+3-2
step 3: there are no "D(division)" so go to "A(addition)":18-2
step 4: there is a "S(subtraction)":16
Final Answer::16 those are the steps for that problem