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Example 1 We need to UNDO the 9, which is added to p. p + 9 = 12 p - 9 = - 9 You must show the steps of solving your equations in this manner! Example 3 We need to UNDO the 5, which is multiplied by x. ÷ 5x = 35 x 5 = ÷ 5 You must show the steps of solving your equations! Use inverse operations to undo the constant before undoing the coefficient. Coefficient 4 x + 9 = 21 Constant Example 1 4 x 4 4 x 4x = 12 + - 9 9 = = - 9 21 divide both sides by 4 subtract 9 from both sides solution Example 2 2p - 3 = 27 2p = 30 2 p = + 3 +3 2 add 3 to both sides divide both sides by 2 solution Your turn! 5y - 15 = 20 Fill in the missing numbers. 5y = 35 y = Solve these two step equations. 3y + 8 = 23 3y = 15 y = Solve these two step equations. 4y - 1 = 15 4y = 16 y = Solve these two step equations. 5y - 4 = 36 5y = 40 y = Solve these two step equations. 6y + 7 = 37 6y = 30 y = Solve these two step equations. 7y - 9 = 54 y = = Solve these two step equations. 2y - 13 = 1 y = = |