Posted by holiday on Sunday, March 27, 2011 at 7:42pm.
- 7th grade math - Damon, Sunday, March 27, 2011 at 7:55pm
If you can do one, you can do them all:
2x+7=4x+3 we want x terms alone on the left so subtract 4x from both sides
-2x + 7 = 3 we want the numbers alone on the right so subtract seven from both sides
-2x = -4 we want the coefficient of x to be one so divide both sides by -2
x = 2
2(2) + 7 = 4(2) + 3 ????
4 + 7 = 8 + 3 ???
11 = 11 sure enough
- 7th grade math - Ms. Sue, Sunday, March 27, 2011 at 8:04pm
You need to get the knowns on one side of the equation and the unknowns on the other side.
Subtract 2x from both sides.
7 = 2x + 3
Subtract 3 from both sides.
4 = 2x
Divide both sides by 2
4/2 = x
2 = x
Do the others the same way.
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