Chapter 7 Notetaking Guide.pdf
Chapter 7 Notetaking Guide.pdf
Chapter 7 Notetaking Guide.pdf
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Example 1<br />
Add the Equations<br />
Solve the linear system.<br />
7x + 2y = -6 Equation 1<br />
5x - 2y = 6 Equation 2<br />
Solution<br />
Add the equations to get an equation in one variable.<br />
7x + 2y = -6 Write Equation 1.<br />
5x - 2y = 6 Write Equation 2.<br />
Add equations.<br />
Solve for<br />
Substitute for in the first equation and solve for<br />
7( ) + 2y = -6 Substitute for<br />
Solve for<br />
Check that (_, __ ) is a solution by substituting for x and<br />
for y in each of the original equations.<br />
Answer The solution is (_, __).<br />
o Checkpoint Use linear combinations to solve the system of<br />
linear equations. Then check your solution.<br />
1.4x + Y = -4 2.4x + 3y = 10<br />
-4x + 2y = 16 12x- 3y = 6<br />
Lesson 7.3 . Algebra 1 Concepts and Skills <strong>Notetaking</strong> <strong>Guide</strong> .149
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