The Commutative Property of Addition.
(2, 2)
2x + 5y = 16 -2x - 3y = -14 2y = 2 y = 1 / x = 5.5 (5.5,1) or (5 1/2,1)
11y + 16 + 5y = 16y + 16 = 16(y + 1)
(9,3)
The Commutative Property of Addition.
no
(2, 2)
2x + 5y = 16 -2x - 3y = -14 2y = 2 y = 1 / x = 5.5 (5.5,1) or (5 1/2,1)
(x, y) = (3, 2)
11y + 16 + 5y = 16y + 16 = 16(y + 1)
(9,3)
(-5, 2)
x=(-5y-1)/3
5y + 7 = 25y = -5y = -1
If: -x-3y = -4 and 3x+5y = 16 Then: x = 7 and y = -1
3x + 5y = -1 2x - 5y = 16 Add the two equations: 5x = 15 or x = 3 Substitute for x in the first equation: 3*3 + 5y = -1 15 + 5y = -1 5y = -10 so y = -10/5 = -2 The solution is (x, y) = (3, -2)