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25 March, 04:17
12 (3-2x) = 84 solve for x.
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Larissa
25 March, 05:39
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12 (3-2x) = 84
3-2x=84:12
3-2x=7
-2x=7-3
-2x=4
x=4: (-2)
x=-2
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Kipper
25 March, 06:29
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12 (3-2x) = 84
do distributive multiplication:
12 (3) + 12 (-2x) = 84
36 - 24x = 84
Deduct 36 to both sides
36 - 36 - 24x = 84 - 36
-24x = 48
divide - 24 to both sides
-24x / - 24 = 48/-24
x = - 2
To check:
12 (3-2x) = 84
12 (3-2 (-2) = 84
12 (3+4) = 84
12 (7) = 84
84 = 84
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