Simplify 9a-4(2a+5)

Math
9a-4(2a+5)
Simplify each term.
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Apply the distributive property.
9a-4(2a)-4⋅5
Multiply 2 by -4.
9a-8a-4⋅5
Multiply -4 by 5.
9a-8a-20
9a-8a-20
Subtract 8a from 9a.
a-20
Simplify 9a-4(2a+5)

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