how do you do this?
United States
2 responses
@feb07mommy (271)
• United States
19 Oct 06
Start with multiplying your numbers outside the parenthesis, multiply into parenthesis:
3(x+6)=5(x-4)
3x+18=5x-20
step 2 is to start eliminating stuff to get the variables on the same side..remember that what you do on one side you must do to the other:
3x+18=5x-20
+20 +20
the 20 on the right cancels out, 18+20=38.
now the equation looks like this:
3x+38=5x
subtract 3x from both sides.
3x+38=5x
-3x -3x
the -3x on the left cancels out:
38=2x
divide by 2 on both sides, because the goal is to get the variable (x) by itself:
38=2x
%2 %2
the 2 on the right canceles out, leaving you with:
38%2=x
19=x.
@missLC123 (88)
•
19 Oct 06
you use the distributive property.. that would but 3x+ (3*6) = 18 then you would say 3x=18 divide by 3 on each side.. you would get x=6... then do the same for the other side of the equation..
5x-20... divide by 5 on each side .. you would get..x=-4.
thats all i know for sure...