11.2 Elimination by substitution  (Page 2/2)

Slove the system $\{\begin{array}{l}7x-3y=2\\ 14x-6y=1\end{array}$

Solve the system $\{\begin{array}{l}4x+3y=1\\ -8x-6y=-2\end{array}$

Solve the system $\{\begin{array}{l}9x-5y=-4\\ 2x+7y=-9\end{array}$

$\{\begin{array}{lll}3x+2y\hfill & =\hfill & 9\hfill \\ y\hfill & =\hfill & -3x+6\hfill \end{array}$

$\{\begin{array}{lll}5x-3y\hfill & =\hfill & -6\hfill \\ y\hfill & =\hfill & -4x+12\hfill \end{array}$

$\{\begin{array}{lll}2x+2y\hfill & =\hfill & 0\hfill \\ x\hfill & =\hfill & 3y-4\hfill \end{array}$

$\{\begin{array}{lll}3x+5y\hfill & =\hfill & 9\hfill \\ x\hfill & =\hfill & 4y-14\hfill \end{array}$

$\{\begin{array}{lll}-3x+y\hfill & =\hfill & -4\hfill \\ 2x+3y\hfill & =\hfill & 10\hfill \end{array}$

$\{\begin{array}{lll}-4x+y\hfill & =\hfill & -7\hfill \\ 2x+5y\hfill & =\hfill & 9\hfill \end{array}$

$\{\begin{array}{lll}6x-6\hfill & =\hfill & 18\hfill \\ x+3y\hfill & =\hfill & 3\hfill \end{array}$

$\{\begin{array}{lll}-x-y\hfill & =\hfill & 5\hfill \\ 2x+y\hfill & =\hfill & 5\hfill \end{array}$

$\{\begin{array}{lll}-5x+y\hfill & =\hfill & 4\hfill \\ 10x-2y\hfill & =\hfill & -8\hfill \end{array}$

$\{\begin{array}{lll}x+4y\hfill & =\hfill & 1\hfill \\ -3x-12y\hfill & =\hfill & -1\hfill \end{array}$

$\{\begin{array}{lll}4x-2y\hfill & =\hfill & 8\hfill \\ 6x+3y\hfill & =\hfill & 0\hfill \end{array}$

$\{\begin{array}{lll}2x+3y\hfill & =\hfill & 12\hfill \\ 2x+4y\hfill & =\hfill & 18\hfill \end{array}$

$\{\begin{array}{lll}3x-9y\hfill & =\hfill & 6\hfill \\ 6x-18y\hfill & =\hfill & 5\hfill \end{array}$

$\{\begin{array}{lll}-x+4y\hfill & =\hfill & 8\hfill \\ 3x-12y\hfill & =\hfill & 10\hfill \end{array}$

$\{\begin{array}{lll}x+y\hfill & =\hfill & -6\hfill \\ x-y\hfill & =\hfill & 4\hfill \end{array}$

$\{\begin{array}{lll}2x+y\hfill & =\hfill & 0\hfill \\ x-3y\hfill & =\hfill & 0\hfill \end{array}$

$\{\begin{array}{lll}4x-2y\hfill & =\hfill & 7\hfill \\ y\hfill & =\hfill & 4\hfill \end{array}$

$\{\begin{array}{lll}x+6y\hfill & =\hfill & 11\hfill \\ x\hfill & =\hfill & -1\hfill \end{array}$

$\{\begin{array}{lll}2x-4y\hfill & =\hfill & 10\hfill \\ 3x=5y\hfill & +\hfill & 12\hfill \end{array}$

$\{\begin{array}{lll}y+7x+4\hfill & =\hfill & 0\hfill \\ x=-7y\hfill & +\hfill & 28\hfill \end{array}$

$\{\begin{array}{l}x+4y=0\\ x+\frac{2}{3}y=\frac{10}{3}\end{array}$

$\{\begin{array}{l}x=24-5y\\ x-\frac{5}{4}y=\frac{3}{2}\end{array}$

$\{\begin{array}{l}x=11-6y\\ 3x+18y=-33\end{array}$

$\{\begin{array}{l}2x+\frac{1}{3}y=4\\ 3x+6y=39\end{array}$

$\{\begin{array}{l}\frac{4}{5}x+\frac{1}{2}y=\frac{3}{10}\\ \frac{1}{3}x+\frac{1}{2}y=\frac{-1}{6}\end{array}$

$\{\begin{array}{lll}x-\frac{1}{3}y\hfill & =\hfill & \frac{-8}{3}\hfill \\ -3x+y\hfill & =\hfill & 1\hfill \end{array}$

( [link] ) Find the quotient: $\begin{array}{l}\frac{x^2-x-12}{x^2-2x-15}\hfill \end{array}÷\frac{x^2-3x-10}{x^2-2x-8}.$

( [link] ) Find the difference: $\begin{array}{l}\frac{x+2}{x^2+5x+6}\hfill \end{array}-\frac{x+1}{x^2+4x+3}.$

( [link] ) Simplify $-\sqrt{81x^8{y}^5{z}^4.}$

( [link] ) Use the quadratic formula to solve $2x^2+2x-3=0.$

( [link] ) Solve by graphing $\{\begin{array}{l}x-y=1\\ 2x+y=5\end{array}$