7.3 The Elimination Method Review Substitution - disadvantages
7.3 The Elimination Method Review Substitution - disadvantages
7.3 The Elimination Method Review Substitution - disadvantages
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Math 90 - Section <strong>7.3</strong>Solve the System by <strong>Elimination</strong>x + y = 62x – y = 3Why it worksSolve the System by <strong>Elimination</strong>3x – y = 7x + 2y = 7Steps for <strong>Elimination</strong>1. Put equations in ____________ and ______________ to eliminate.2. _______ one or both equations to _____________ in one variable.3. _______ equation and solve.4. Back substitute first answer to find solution for the other variable.5. Check your ordered pair in both equations.Scott Eckert 2
Math 90 - Section <strong>7.3</strong>Solve the System by <strong>Elimination</strong>3x + 2y – 3 = 02x = -5y + 13Steps for <strong>Elimination</strong>1. Put in standard form2. Set up opposites3. Add equation & solve4. Solve for other variable5. CheckSolve the System by <strong>Elimination</strong>1 1x+ y = 13 23x+ y = 04Steps for <strong>Elimination</strong>1. Put in standard form2. Set up opposites3. Add equation & solve4. Solve for other variable5. CheckScott Eckert 3
Math 90 - Section <strong>7.3</strong>Solve the System by <strong>Elimination</strong>a – 3b = 2-3a + 9b = 2Steps for <strong>Elimination</strong>1. Put in standard form2. Set up opposites3. Add equation & solve4. Solve for other variable5. CheckendScott Eckert 4
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