Lesson 14
Making More New, True Equations
 Let’s practice combining like terms and working with horizontal and vertical lines.
14.1: Criss Cross'll Make You Jump
Match each equation with its graph.
 \(x=7\)
 \(y=7\)
 \(x+y=7\)
14.2: They're Like Terms, Man
Rewrite each expression by combining like terms.

\(11s2s\)

\(5t+3z2t\)

\(23s(13t+7t)\)
 \(7t + 18r + (2r  5t)\)
 \(\text{}4x + 6r  (7x + 2r)\)
 \(3(c5) + 2c\)
 \(8x  3y + (3y  5x)\)
 \(5x + 4y  (5x + 7y)\)
 \(9x  2y  3(3x+y)\)
 \(6x+12y + 2(3x6y)\)
14.3: Finding More Lines
For each system of equations:
 Solve the system of equations by graphing. Write the solution as an ordered pair.
 Write an equation that would represented by a vertical or horizontal line that also passes through the solution of the system of equations.
 Graph your new equation along with the system.

\(\begin {cases} \begin {align}y = 3x+5\\ y=\text{}x+1\end{align} \end {cases}\)

\(\begin {cases} \begin {align}y = \frac{1}{3}x2\\ y=x6\end{align} \end {cases}\)

\(\begin {cases} \begin {align} 2x+3y=10\\ x+y=3\end{align} \end {cases}\)