Answers:
5(a+3)-4(3-2a) When opening brackets you multiply the outer integer by all the integers in the bracket. Also note that a minus sign outside the bracket changes the signs inside the bracket thus minus becomes plus and vice versa.
=5a+15-12+8a Group like terms together
=5a+8a+15-12 Add and subtract accordingly
=13a+3----------Final answer!
5a +15 - 12 + 8a
13a +3
5a+15-12+8a
5a+8a=13a
15-12=3
13a+3 (final answer)
5a + 15 - (12 - 8a )
5a + 15 - 12 + 8a
13a + 3
5(a+3)-4(3-2a)=13a+3
you have to combine like terms. First multiply :
5(a+3) becomes 5a+15 and 4(3-2a) becomes 12-8a
so your probelm becomes
5a+15 - 12-8a, so you combine the 'a's 5a-8a=3a right?then15-12=3 you come out with 3a +3
simplification is not always simple, go one step at a time.
Betz
expand the expression
5(a+3)= 5a+15
4(3-2a)=12-8a
lets return to the original expression, then u replace it with the expansion
5(a+3)-4(3-2a)
= 5a+15-(12-8a)
=5a+15-12+8a
=13a+3 -------final answer!
5a + 15 -12 + 8a
then 5a + 8a = 13a
then 15-12=3
simplify so it will be...13a + 3
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