Incorrect. Add the second and third equations to eliminate c. Then multiply the first equation by $\displaystyle-{3}\usepackage{cmbright}\Huge\$ and add it to the new equation to eliminate b. Solve for a. Substitute this value into the first and third equations to find the values for b and c. Check your solution in all of the original equations. The correct answer is $\displaystyle-{3}\usepackage{cmbright}\Huge\$ .