1. Solving a System of Equations
by Elimination
1. Put the
equations in
___________ form.
2. Decide what to multiply by so you can __________ one variable.
5. _______ the value into the original equation.
4. _____.
3. ___.
y = x - 1
x + y = 3
© 2009, Dr. Jennifer L. Bell, LaGrange High School, LaGrange, Georgia Adapted from various sources (MCC9-12.A.REI.1; MCC9-12.A.REI.3; MCC9-12.A.REI.5; MCC9-12.A.REI.6; MCC9-12.A.REI.12)

2. Solving a System of Equations
by Elimination
1. Put the
equations in
standard form.
2. Decide what to multiply by so you can eliminate one variable.
5. Substitute the value into the original equation.
4. Solve.
3. Add.
y = x - 1
x + y = 3
y = x – 1
-x -x
-x + y = -1
-x + y = - 1
x + y = 3
-x + y = - 1
x + y = 3
2y = 2
2y = 2
x + (1) = 3
2y = 2
y = 1
x = 2
-x + y = - 1
x + y = 3
eliminate x
(2, 1)
© 2009, Dr. Jennifer L. Bell, LaGrange High School, LaGrange, Georgia Adapted from various sources (MCC9-12.A.REI.1; MCC9-12.A.REI.3; MCC9-12.A.REI.5; MCC9-12.A.REI.6; MCC9-12.A.REI.12)