Question

waht is the answer to this problem 2r-s=1 and 3r+2s=19.

Answer 1

Elimination method :

The system of equations are .

To get two equations that contain opposite terms multiply the first equation by 2.

Write the equations in column form and add the equations to eliminate s - variable.

The resultant equation is .

Substitute the value of in either of the original equations and solve for s.

The first equation: .

.

The solution .