The equation is .

Apply subtraction property of equality: Subtract 10*x* from each side

Rearrange the terms using commutative property of addition: a+b = b+a.

(Apply additive inverse property: )

(Apply additive identity property: )

(Substitute *x* = 3)

(Multiply: )

(Subtract: )

The value of .

"I want to tell you that our students did well on the math exam and showed a marked improvement that, in my estimation, reflected the professional development the faculty received from you. THANK YOU!!!" June Barnett |

"Your site is amazing! It helped me get through Algebra." Charles |

"My daughter uses it to supplement her Algebra 1 school work. She finds it very helpful." Dan Pease |