Question

Solve for x and y: 4x + y = -1 , 7x + y = -4 ​

Answer 1

Subtracting both the equations,

$(7x + y) - (4x + y) = ( - 4) - ( - 1) \\ 7x + y - 4x - y = - 4 + 1 \\ 3x = - 3 \\ x = \frac{ - 3}{3} \\ - 1 \: answer$

y =

4x+y = -1

4*-1 + y = -1

-4 + y = -1

y = -1+4

y = 3 Answer