For a complete lesson on one-step addition equations, go to http://www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn that solving an equation for x means isolating the x on one side of the equation. To isolate the x, the following techniques are used. If a number is being added to x, subtract the number from both sides of the equation. If a number is being subtracted from x, add the number to both sides of the equation. If a number is being multiplied by x, divide both sides of the equation by the number. If a number is being divided by x, multiply both sides of the equation by the number.
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