Envision Math 2.0: Grade 6, Volume 1
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7. Simplify Algebraic Expressions
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Exercise 12 Page 164

Remember, only like terms can be combined.

2.2w-0.5

Practice makes perfect
The first step in simplifying this expression is to identify which, if any, terms can be combined. Remember, only like terms — constant terms or terms with the same variable — can be combined. 0.5w+1.7w - 0.5 In this case, we have two w-terms and one constant. Only the w-terms can be combined, so to simplify the expression we will rearrange it according to the Distributive Property to combine the like terms.
0.5w+1.7w-0.5
(0.5+1.7)w-0.5
2.2w-0.5