Question

please solve this problem immediately step by step ​

Answer 1

a-{3a-(2a-5)/10}-(2a-57)/6

=a-3a-2a/10+5/10-2a/6+57/6

=a-3a-a/5+1/2-a/3+57/6

=(30a-90a-6a+15-10a+285)/30

=(-76a+300)/30

=-38a/15+10