-12(x + 8) = 3(x - 72)?

2009-08-28 9:44 am

what does x equal???? i need it in say 5 minutes.

回答 (9)

2009-08-28 9:55 am

✔ 最佳答案

- 12 x - 96 = 3 x - 216
216 - 96 = 15 x
120 = 15 x
x = 8

Got there as quick as I could !

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2009-08-28 5:13 pm

-12x - 96 = 3x - 216

-12x - 3x = 96-216

-15x = -120

x=120/15

x = 8

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2009-08-28 4:58 pm

-12(x + 8) = 3(x - 72)
-12(x) - 12(8) = 3(x) - 3(72)
-12x - 96 = 3x - 216
-12x - 3x = 96 - 216
-15x = -120
x = -120/(-15)
x = 8

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2009-08-28 4:51 pm

x=8

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2009-08-28 4:51 pm

-12X - 96 = 3X - 216

-12X - 3X = -216 + 96

15X = -120

X = 8

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2009-08-28 4:49 pm

-12x-96=3x-216

-15x=120

x=-8

Cheers

Ethan

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2009-08-28 4:49 pm

-12(x + 8) = 3(x - 72)

==>

-4x - 32 = x - 72

==>

5x = 40

==>

x = 8

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2009-08-28 4:48 pm

-12x-96=3x-216
15x=120
x=8

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2009-08-28 4:48 pm

-12(x + 8) = 3(x - 72)
12x-96= 3x- 216
12x-9x= 216+96
3x= 120
x=40

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