PRE-ALGEBRA

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Solve the equation.

3x + 7x =120
It will help if you explain it too. Thanks!

  • PRE-ALGEBRA -

    3x + 7x =120

    10x = 120

    This means that 10 time some number is 120.

    Divide both sides of the equation by 10.

    x = 120/10

    x = ?

  • PRE-ALGEBRA -

    combine like terms

    10x=120
    divide both sides by 10
    x= 12

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