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March 29, 2017

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2x+7=4x+3 ?

3x+6=5x+1 ?

2n+6=8N+3 ?


6N+9=9n+6 ?

  • 7th grade math - ,

    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

    now check
    2(2) + 7 = 4(2) + 3 ????
    4 + 7 = 8 + 3 ???
    11 = 11 sure enough

  • 7th grade math - ,

    2x+7=4x+3

    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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