Question
Solve each system of equations by the addition method. See Example 1$$\left\{\begin{array}{l}{3 x+y=5} \\{6 x-y=4}\end{array}\right.$$
Step 1
This is possible because one equation has a positive y and the other has a negative y. When added together, the y terms will cancel out. This gives us: $$3x + y + 6x - y = 5 + 4$$ which simplifies to: $$9x = 9$$ Show more…
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