Glencoe Math: Course 2, Volume 2
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Glencoe Math: Course 2, Volume 2 View details
7. Subtract Linear Expressions
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Exercise 1 Page 407

To find the additive inverse of a linear expression, you can multiply each term of the expression by -1.

5x-2

Practice makes perfect
First, let's find the additive inverse of the linear expression within the second set of parentheses. To do so, we can distribute -1 into the second set of parentheses. When we do so, we multiply each term of that linear expression by -1.
(9x+5)-(4x+3)
(9x+5)+((-1) * 4x+(-1) * 3)
(9x+5)+(- 4x+(-3))
(9x+5)+(- 4x-3)
Now, let's identify which, if any, terms can be combined. Remember, only like terms — constant terms or terms with the same variable — can be combined.

( 9x+ 5)+( - 4x - 3) In this case, we have two x-terms and two constants. Let's arrange the like terms in columns. Then, let's perform the addition. 9 x +5& (+) -4 x -3& 5 x +2& Therefore, we get the following result. (9x+5)-(4x+3) = 5x-2