solve the following system of equations using elimination -6x+10y=-16 6x-3y=12. -6+10y=-16, 6x-3y=-12/ y=___6x-3(__)=-12 6x-__=-12 6x=__ y=___ the solution is (___,___)

the following answers that can be used in this are: 12,-28,4,24,-4,-24,4/7,-4/7,0,-12,28,7

1 answer

To solve the given system of equations using elimination, we have:

  1. \(-6x + 10y = -16\)
  2. \(6x - 3y = 12\)

First, we can add the two equations together to eliminate \(x\):

\[ -6x + 10y + 6x - 3y = -16 + 12 \]

This simplifies to:

\[ (10y - 3y) = -16 + 12 \]

\[ 7y = -4 \]

Now, solve for \(y\):

\[ y = \frac{-4}{7} \]

Now that we have \(y\), we can substitute this value back into one of the original equations to solve for \(x\). We'll use the second equation:

\[ 6x - 3y = 12 \]

Substituting \(y = \frac{-4}{7}\):

\[ 6x - 3\left(\frac{-4}{7}\right) = 12 \]

\[ 6x + \frac{12}{7} = 12 \]

Now, subtract \(\frac{12}{7}\) from both sides:

\[ 6x = 12 - \frac{12}{7} \]

To perform this subtraction, convert \(12\) into a fraction with a common denominator:

\[ 12 = \frac{84}{7} \]

Now, we can substitute this back in:

\[ 6x = \frac{84}{7} - \frac{12}{7} \]

\[ 6x = \frac{84 - 12}{7} \]

\[ 6x = \frac{72}{7} \]

Now, divide by \(6\) to solve for \(x\):

\[ x = \frac{72}{7} \cdot \frac{1}{6} = \frac{72}{42} = \frac{12}{7} \]

So, we have:

\[ x = \frac{12}{7} \quad \text{and} \quad y = -\frac{4}{7} \]

Finally, the solution to the system of equations is:

\[ \left(\frac{12}{7}, -\frac{4}{7}\right) \]

In terms of the options provided:

\[ \text{The solution is } \left(12/7, -4/7\right) \]