one of the equations for one of its variables Example: -x + y = 1

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one of the equations for one of its variables Example: -x + y = 1 If you can easily isolate one of the variables, use SUBSTITUTION! STEPS: 1. SOLVE 2. SUBSTITUTE 3. SUBSTITUTE 4. The values of x and y 5. CHECK *Remember: The solution to a system is an ordered pair (x , y) that makes the equation true. one of the equations for one of its variables Example: -x + y = 1 2x + y = -2 the expression from step 1 into the other equation and solve for the other variable the value from step 2 into the revised equation from step 1 and solve make the ordered pair solution the solution in each of the original equations

1. 3. 2. 4. The length of a rectangle is 3 cm more than twice the width. The perimeter of the rectangle is 42 cm. Find the dimensions of the rectangle.