$\"\"$

The equations are

$\"\"$ Equation (1)

$\"\"$ Equation (2)

Subtract $\"\"$ from each side.

$\"\"$

$\"\"$ \ \ Multiply each side by negative one.

$\"\"$ Equation (3)

$\"\"$

Multiply the equation (3) by 6.

$\"\"$

$\"\"$ Equation (4)

Eliminate the variable s by subtracting the Equation (1) from Equation (4)

$\"\"$ (Subtract the corresponding columns) $\"\"$

Infinitely many solutions.