3N + 4M = 230; 5N +8M = 390

Question

Please solve this.

Answer 1

Elimination method :

The system of equations are .

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

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

The resultant equation is .

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

The first equation: .

.

The solution .