# Lesson goal: Solve Equations

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Solving equations always comes up in many areas of math, so we've developed a function called solve that knows how to solve linear equations. Linear equations are equations where the exponents of the variables you want to solve for are always one ($1$).

The solve function works like this:

answer=solve("your-equations","variables-to-solve-for")
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# Now you try. Try solving a linear equation. After that, try solving two equations with two unknowns (that is a "system of equations").

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See your results here:

This example will solve $4x-3y=-3$ for $x$. You might also try:
• Solving $5x+3y=6$ and $2x-4y=5$ for $x$ and $y$.
• Solving $2a+5b=3$ and $2a+b=9$ for $a$ and $b$.
• $u+4u=56$ for $u$.
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