Answer:
1. 20x+40
2. 6f+6g
3. 77-28x
Explanation:
Use distributive property for all
1) 10(2x+9)-50
20x+90-50
20x+40
2) 6(f+g)
6f+6g
3) 77-28x
4) 3.2(5w+3)
16w + 9.6
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