Algebraic Solution: Solving an equation by adding/subtracting from both sides

Solve the following system of equations:

$\begin{cases} x-y=5 \\ 2x-3y=8 \end{cases}$

$x=2,y=-3$

Solve the above set of equations and choose the correct answer.

$(I)-2x+3y=4$

$(II)x-4y=8$

$x=-8,y=-4$

Solve the above set of equations and choose the correct answer.

$(I)-5x+4y=3$

$(II)6x-8y=10$

$x=-4,y=-4\frac{1}{4}$

Solve the above set of equations and choose the correct answer.

$(I)-8x+3y=7$

$(II)24x+y=3$

$x=0.025,y=2.4$

Solve the above set of equations and choose the correct answer.

$(I)7x-4y=8$

$(II)x+5y=12.8$

$x=2.33,y=2.09$

Solve the following system of equations:

$\begin{cases} -8x+5y=3 \\ 10x+y=16 \end{cases}$

$x=1.32,y=2.8$

Solve the above set of equations and choose the correct answer.

$(I)\frac{1}{3}x-4y=5$

$(II)x+6y=9$

$x=11,y=-\frac{1}{3}$

Solve the following system of equations:

$\begin{cases} 2x-\frac{1}{5}y=18 \\ 3x+y=6 \end{cases}$

$x=7.38,y=-16.14$

Solve the above set of equations and choose the correct answer.

$(I)-y+\frac{2}{5}x=13$

$(II)\frac{1}{2}y+2x=10$

$x=7.5,y=-10$

Solve the above set of equations and choose the correct answer.

$(I)\frac{1}{2}x+\frac{7}{2}y=10$

$(II)-3x+7y=12$

$x=2,y=2.57$