Solving Multi-Step Equations

Distributive Property Review Match the expression with its simplified form. −6(a + 8) -6a - 48 -6(a - 8) -6a + 48 6(−5n + 7) -30n + 42 6(−5n - 7) -30n - 42 8(−b − 4) -8b -32 Combine like terms. n − 10 + 9n − 3 9n -13 10n -13 10n -7 10n + 13 Combine like terms, then solve.4n - 2n = 8 n = 2 n = 4 n = 1.5 n = .25 Solve the equation. x = 6 x = 1.5 x = 216 x = -6 Solve the equation.-2 - 3a = -23 a = 8.3 a = -7 a = 7 a = -8.3 Use the distributive property and then solve the equation.5(x + 6) = 60 x = 18 x = 6 x = 10.8 x = 30 This student's work has a mistake in it. Explain what the student did wrong. Consider the following problem:The cost C (in dollars) of making n watches is represented by C = 15n + 85. How many watches are made when the cost is $385?How would you set up an equation to solve this problem? 15n + 85 + 385 = C 15(385) + 85 = C 15n + 85 = 385