How do you simplify $18 (1 + 4 a) - 3 (20 a - 20)$ $18( 1+ 4a ) - 3( 20a - 20)$ ?

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Answer 1 · 2018-04-09T10:58:59

$78 + 12 a$ $78+12a$

First, expand the brackets

$= 18 + 72 a - 60 a + 60$ $= 18+72a - 60a + 60$

then combine like terms

$= 78 + 12 a$ $=78 + 12a$

How do you simplify 18( 1+ 4a ) - 3( 20a - 20)18(1+4a)−3(20a−20)18( 1+ 4a ) - 3( 20a - 20)?