subtract 24ab-10b-18a from 30ab + 12b+14a

Hi

30ab + 12b + 14a - (24ab - 10b - 18a)

Open the brackets

30ab + 12b + 14a - 24ab + 10b + 18a

Now take like terms together

30ab - 24ab + 12b + 10b + 18a + 14a

= 6ab + 22b + 32a

Cheers!!

Best of luck for your exams