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Home Q & A Board Science-Related Homework Help Mathematics
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lelan17 lelan17
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11 years ago
I need math help bad!


Here is the problem:
Prove or disprove the two algebraic expressions equivalent.

6x - 2 (1 + x ) = -2 + 4x

Thanks!
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wrote...
#1
11 years ago
the left hand side
6x-2(1+x) =6x -2 -2x =-2 +4x = left hand side

so they are equvalent
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michdemmichdem
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#2
Posts: 32
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11 years ago
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#3
11 years ago
substitute a number for x.  to keep it simple substitute 1.  
6(1)-2(1+1)=  2
-2+4(1)=2
so far they are equal just to make sure, substitute in 2
6(2)-2(1+2)=6
-2+4(2)=6

yay it works!!!

equations are equivalent.
wrote...
#4
11 years ago
6x - 2 (1 + x ) = -2 + 4x
6x-2-2x=-2+4x   (i distributed the -2)
4x-2=-2+4x          (simplified)
4x-2 = 4x-2

sooo yes that proves they're equal!
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