7. Subtract Linear Expressions
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To find the additive inverse of a linear expression, you can multiply each term of the expression by -1.
- x + 2
We want to find the following difference. 2(x+1)-3x First, let's distribute 2 into the first set of parentheses.
Distribute -1
(- a)b = - ab
Zero Property of Multiplication
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. ( 2x+ 2)+( -3x+ 0) 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. 2 x +2& (+) -3 x +0& - x + 2& Therefore, we get the following result. (2x+2)-3x = - x + 2