Question
Solve each system by substitution. See Example 1.$$\left\{\begin{array}{l}{2 x+y=-7} \\{y=3 x+8}\end{array}\right.$$
Step 1
$$ We can see that the second equation is already solved for $y$, so we can substitute $y$ in the first equation with $3x + 8$. Show more…
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