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vladimir1956 [14]
3 years ago
12

25 POINTS!

Mathematics
1 answer:
steposvetlana [31]3 years ago
5 0
-\dfrac12x+3=-x+7

Add -3 to both sides:

-\dfrac12x+3-3=-x+7-3
-\dfrac12x=-x+4

Multiply both sides by -2:

-2\times\left(-\dfrac12\right)x=-2(-x+4)
x=-2(-x+4)

On the right hand side, distribute the -2:

x=2x-8

Add -2x to both sides:

x-2x=2x-2x-8
-x=-8

Divide by -1:

\dfrac{-x}{-1}=\dfrac{-8}{-1}
x=8

(and not x=-8, unless the original equation wasn't correctly written/interpreted?)
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