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Mathematics
Leticia Roach
21 February, 02:58
12-6 (w-3) = 3 (-5-3w) + 21
+3
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Kiana Wiley
21 February, 04:12
0
w = - 8
Step-by-step explanation:
12-6 (w-3) = 3 (-5-3w) + 21 (expand parentheses)
12-6 (w) - (-6) (3) = (3) (-5) - (3) (3w) + 21
12 - 6w + 18 = - 15 - 9w + 21
-6w + 30 = 6 - 9w (add 9w to both sides)
-6w + 30 + 9w = 6
3w + 30 = 6 (subtract 20 from both sides)
3w = 6 - 30
3w = - 24 (divide both sides by 3)
w = - 24 : 3
w = - 8
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