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7x + 10 - ( x+ 7 ) =

Guest Feb 1, 2015

Best Answer 

 #1
avatar+93691 
+5

7x + 10 - ( x+ 7 ) =

there is an invisable 1 between the minus sign and the backet.

7x + 10 - 1( x+ 7 ) =

Now the minus sign belongs to the 1

-1(x+7)=-1*x+-1*7 = -x-7

so   

   7x + 10 - ( x+ 7 )

=7x+10     -x-7

=7x-x   +10-7

=6x     +3

Melody  Feb 2, 2015
 #1
avatar+93691 
+5
Best Answer

7x + 10 - ( x+ 7 ) =

there is an invisable 1 between the minus sign and the backet.

7x + 10 - 1( x+ 7 ) =

Now the minus sign belongs to the 1

-1(x+7)=-1*x+-1*7 = -x-7

so   

   7x + 10 - ( x+ 7 )

=7x+10     -x-7

=7x-x   +10-7

=6x     +3

Melody  Feb 2, 2015

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