X + Y = 7.9
X - Y = 5.31
X = 7.9 - Y
7.9 - Y - Y = 5.31
- 2Y = - 2.59
Y = 1.295
X = 7.9 - 1.295 = 6.605
X + Y = 7.9
X - Y = 5.31
X = 7.9 - Y
7.9 - Y - Y = 5.31
- 2Y = - 2.59
Y = 1.295
X = 7.9 - 1.295 = 6.605