Answer:
a) 5r +3 + 2(r+9) = 7r + 21
b) 2 (4w - 5) - 2 (w - 7) = 6w + 4
Explanation:
a) 5r +3 + 2(r+9) = 5r +3 + 2r +18 = 7r + 21
b) 2 (4w - 5) - 2 (w - 7) = 8w -10 -2w +14 = 6w + 4
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