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Solve the following equation: 2x + 4 = 16 x = 10 x = 6 x = 2 none of these The carnival has a $5 entrance fee and then charges $1.50 per ride. If Sue went to the carnival and spent $44.00, write and solve an equation to show how many rides Sue rode. 1.50r + 5 = 44; 26 rides 5(1.50) + r = 44; about 36 rides 5r + 1.50 = 44; 8.5 rides You are trying to find the value of x that makes this equation true (equal). How can you do this? -19 = -3x + 2 make both sides zero Isolate the variable (x) Isolate the constant 2. How would you isolate the variable, x? You need to isolate the variable, x, alone on one side of the equal sign. -19 = -3x + 2 use inverse (opposite) operations multiply by zero add x to each term The constant term needs to be cancelled out first. -3 and 2 need to be cancelled out to get x alone. -19 = -3x + 2 Which term is the constant? The 2 The -3 What would you do to BOTH sides of the equation to cancel out the constant 2? -19 = -3x + 2 add 2 multiply 2 divide 2 subtract 2 Find the value of x. -19 = -3x + 2 -21 -7 17/3 7 What would you do to BOTH sides of the equation to cancel out the constant 10? subtract 10 multiply 10 divide 10 add 10 |