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Levart [38]
3 years ago
6

12(3-2x)=84 solve for x.

Mathematics
2 answers:
zimovet [89]3 years ago
8 0
12 (3-2x)=84
3-2x=84:12
3-2x=7
-2x=7-3
-2x=4
x=4:(-2)
x=-2
OlgaM077 [116]3 years ago
7 0
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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