Question 117895
2{[3(m-5)+18]-[3(5m-3)+4]} Start by applying the "distributive property" to the inner-most parentheses.
2{[(3m-15)+18]-[(15m-9)+4]} Now you can remove the inner-most parentheses and simplify the inner backets ([...])
2{[3m-15+18}-[15m-9+4]}
2{[3m+3]-[15m-5]} Remove the brackets and simplify inside the curly brackets ({...})
2{3m+3-15m+5}
2{3m-15m+3+5}
2{-12m+8} Finally, apply the distibutive property.
-24m+16