Solve the following system of equation by addition. (elimination)?

4x + y = -6
x+ 3y = 4
multiply 2nd eqn by -4 and add both, to get
=> 4x+y -4x - 12y = -6 - 16
=> - 11 y = - 22
=> y = 2,
put y =2 in eqn (2), to get
=> x + 3(2) = 4
=> x = 4 - 6 = -2
Answer x=-2, y=2
 
4x + y = -6
x+ 3y = 4
multiply 2nd eqn by -4 and add both, to get
=> 4x+y -4x - 12y = -6 - 16
=> - 11 y = - 22
=> y = 2,
put y =2 in eqn (2), to get
=> x + 3(2) = 4
=> x = 4 - 6 = -2
Answer x=-2, y=2
 
Back
Top