CPM Homework Help : CCG Problem 11-79

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11-79.

Solve each system of equations below. Write the solution in the form $\left(x,y\right)$ . Show all work.

$\begin{aligned}[t] y + 3x = 14 \\ y - 3x =6 \phantom{0} \end{aligned}$
Hint (a):
Use the elimination method to solve for $y$ .
Then use substitution to solve for $x$ .
Be sure to put your answer in $(x, y)$ form.
Answer (a):
$\left(\frac{4}{3},10\right)$

$\begin{aligned}[t] y = 6 - 3x \\ 2x + y = 7 \end{aligned}$
Hint (b):
Use the substitution method.

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