Question

Simplify: `10  – {4"a" – (7 – bar ("a" - 5) - (5"a" - bar(1 + "a")))`

Answer 1

`10  – {4"a" – (7 – bar ("a" - 5) - (5"a" - bar(1 + "a")))`

= 10 – {4a – (7 – a + 5) – (5a – 1 – a)}

= 10- {4a -(12 - a) -(4a - 1)}

= 10 – {4a – 12 + a- 4a + 1}

= 10 – 4a + 12 – a + 4a - 1

= 10 + 12 – 1 – 4a – a + 4a

= 21 - a