What are the solution of the following system X-y=-4 / 4x-4y=-16
1 answer:
Solve equation [1] for the variable y
[1] y = -x - 4
Plug this in for variable y in equation [2]
[2] 4x - 4•(-x -4) = 16
[2] 8x = 0
Solve equation [2] for the variable x
[2] 8x = 0
[2] x = 0
By now we know this much :
x = 0
y = -x-4
Use the x value to solve for y
y = -(-0/32766)-4 = -4
Solution :
{x,y} = {0/32766,-4}
{x,y} = {0,-4}
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