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It is important to learn this process, so that you can apply it to more difficult equations! Solving Two-Step Equations left side Every equation has 2 sides, separated by the = sign. We can only have one = sign in the equation. 4 + x = 12 right side We also use INVERSE OPERATIONS. The inverse of multiplication is division. The inverse of division is multiplication. The inverse of subtraction is addition. The inverse of addition is subtraction. Use inverse operations to undo the constant before undoing the coefficient. Coefficient 4 x + 9 = 21 Constant Example 1 4 x 4x = 12 4 4 + x - 9 9 = = - 9 21 3 solution divide both sides by 4 subtract 9 from both sides Example 2 2p - 3 = 27 2p = 30 2 p = 15 + 3 +3 2 add 3 to both sides solution divide both sides by 2 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. 6y + 7 = 37 6y = 30 y = Solve these two step equations. 8y - 2 = 14 8y = y = Solve these two step equations. 4y + 3 = 51 4y = y = Solve these two step equations. 5y - 1 = 29 5y = y = Solve these two step equations. 3y + 14 = 23 3y = y = Solve these two step equations. 8y - 11 = 21 8y = y = Solve these two step equations. 7y - 9 = 54 y = = Solve these two step equations. 2y + 7 = 17 y = = Solve these two step equations. 4y - 8 = 32 y = = Solve these two step equations. 5y + 3 = 18 y = = Solve these two step equations. 7y + 9 = 44 y = = |