2y+5y=10 7y=10 y=10/7
-2y = 10 2y = -10 y = -5
y = 5
There are 2 unknowns
3y - 3 = 2y + 5 3y - 2y = 5 + 3 y = 8
2y+26 = 28 2y = 28-26 2y = 2 y = 1
(12, 1)
x = 12, y = 1
The equation is -2y + 16 = 10
x = 12 and y = 1 (12, 1)
2y = -10y = -58 - 2x - 2(-5) = -108 - 2x + 10 = -10-2x = -10 - 182x = 28x = 14Check:2y = 8 - 2x - 2y = -102(-5) = 8 - 2(14) - 2(-5) = -10-10 = 8 - 28 + 10 = -10-10 = -20 + 10 = -10-10 = -10 = -10
4
(2, -1)
(4, -1)
All that can be deduced is that x + y = 14.
2y+5y=10 7y=10 y=10/7
parallel