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In a+3(5a+8)=72, how do you find a?

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order of operations
asked May 4, 2014 in PRE-ALGEBRA by anonymous

1 Answer

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The expression is  a + 3(5a + 8) = 72.

To simplify the expression following order of operations to performed:

  1. Evaluate the expressions inside grouping symbols.
  2. Evaluate powers
  3. Multiply and/or Divide in order from left to right.
  4. Add and/or Subtract in order from left to righ

Evaluate the expressions inside grouping symbols.

a + 3(5a + 8) - 72 = 0

Next operation is mutiplecation

a + 15a + 24 = 72

Next operation is addition

16a  = 72 - 24

a = 48/16 = 3.

The value of a = 3.

answered May 5, 2014 by lilly Expert

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