+9479 x + y = 0.25 Subtract y from both sides.
x = 0.25 - y
x/y = 0.25 Substitute (0.25 - y) in for x.
(0.25 - y)/y = 0.25 Distribute 1/y.
0.25/y - y/y = 0.25
0.25/y - 1 = 0.25 Add 1 to both sides.
0.25/y = 1.25 Multiply both sides by y.
0.25 = 1.25y Divide both sides by 1.25.
0.2 = y
x = 0.25 - y Substitute 0.2 in for y.
x = 0.25 - 0.2
x = 0.05
Just like Guest found. This is just an explanation.
