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It is important to learn this process, so that you can apply it to more difficult equations! Solving One-Step Equations left side Every equation has 2 sides, separated by the = sign. x + 7 = 10 right side Example 1 The inverse of addition is subtraction, so we need to subtract 9 from both sides of the equation. We need to UNDO the 9, which is added to p. p + 9 = 12 p - 9 = - 9 3 You must show the steps of solving your equations in this manner! Example 2 We need to UNDO the 3, which is subtracted from s. The inverse of subtraction is addition, so we need to add 3 to both sides of the equation. s s - 3 = 17 + 3 = + 3 20 You must show the steps of solving your equations! Balance the equation. x = −20 x + 7 = -13 First, do two pencil strokes, then balance the equation. x = 2 x − (−7) = 9 Balance the equation. x = −5 x - 4 = -9 Balance the equation. x = −2 x + 5 = 3 Balance the equation. 5 = -2 + x 7 = x Balance the equation. 7 = -4 + x = x Balance the equation. x = x - 6 = -3 -10 = -8 + x Balance the equation. = x Balance the equation. x = x − (−3) = 7 |