Question

How to simplify -16/12

Answer 1

$-\dfrac{16}{12}=-\dfrac{16:4}{12:4}=-\dfrac{4}{3}=-1\dfrac{1}{4}\\-------------------------\\\text{Your solution of a system of equations is incorrect.}\\\\\text{Correct is}\\\\\left\{\begin{array}{ccc}6x+5y=4&\text{multiply both sides by 7}\\6x-7y=-20&\text{multiply both sides by 5}\end{array}\right\\\underline{+\left\{\begin{array}{ccc}42x+35y=28\\30x-35y=-100\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad72x=-72\qquad\text{divide both sides by 72}\\.\qquad\boxed{x=-1}$

$\text{Put the value of x to the first equation:}\\\\6(-1)+5y=4\\-6+5y=4\qquad\text{add 6 to both sides}\\5y=10\qquad\text{divide both sides by 5}\\\boxed{y=2}\\\\Solution\ of\ the\ system\ of\ equations:\ \boxed{x=-1\ and\ y=2}$

$\text{After adding both sides of the equations in this form.}\\\text{Then you will get}\\\\12x-2y=-16\ not\ 12x=-16$

Answer 2

-8/6

-4/3 ←final answer