We know that:
( + ) + ( − ) = ( − )
and:
( − ) ∗ ( + ) = ( − )
8 + ( − 3 ) [ 6 + ( − 6 a )] = 8 + ( − 3 ) ∗ 6 + ( − 3 ) ∗ ( − 6 a ) = 8 − 18 + 18 a = ( − 10 ) + 18 a
if you have solve for a then:
( − 10 ) + 18 a = 0 18 a = 10 a = 18 10 a = 9 5
The expression 8 − 3 ( 6 − 6 a ) simplifies to − 10 + 18 a or 18 a − 10 . This simplification is achieved by distributing -3 and combining like terms. The final result is a linear expression in terms of a .
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