$\"\"$ $\"\"$

The equation is $\"\"$ .

Apply multiplication Property of equality: Multiply each side by negative 7.

$\"\"$ \ \

$\"\"$ (Cancel common terms) \ \

$\"\"$ (Multiply: $\"\"$ ) $\"\"$ \ \

Check:

To check the solution, substitute $\"\"$ in original equation.

$\"\"$

$\"\"$ (Product of two same signs is positive) \ \

$\"\"$ (Multiply: $\"\"$ ) \ \

Compare the values, the equation is true.

$\"\"$

The value of c is $\"\"$ .