Emily is solving the equation 2(x+9) = 4 (x +7)+ 2. Her steps are shown. Part A Step 1: 2(x + 9) = 4(x + 7) + 2 %3D Step 2: 2x + 18 4x + 28 +2 Step 3: 2x + 18 4x + 26 Part A Step 4: -8 = 2x Click on the first step in which Emily made an error. Step 5: -4 = x

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Equations and Inequations

Equations and inequalities describe the relationship between two mathematical expressions.

Linear Functions

A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.