x + y = -2
2x + 3y = -9
You solve this by elimination - multiply both sides of first equation by 3, then subtract, solve for x, then substitute in any of the equations to solve for y
3x + 3y = -6
2x + 3y = -9
subtracting,
x = 3
substituting into 1st equation,
y = -2-3 = -5
2x + 5y = 16 -2x - 3y = -14 2y = 2 y = 1 / x = 5.5 (5.5,1) or (5 1/2,1)
2x-11
-2x plus 3y equals 1
x = 3 and y = 2
x - 3y = -3: multiply by -2 giving -2x + 6y = 6, but -2x + 6y = 12 so we have a problem! Misprint?
2x plus 3y
2x + 5y = 16 -2x - 3y = -14 2y = 2 y = 1 / x = 5.5 (5.5,1) or (5 1/2,1)
2x-11
-2x plus 3y equals 1
x = 3 and y = 2
(2,7)
x - 3y = -3: multiply by -2 giving -2x + 6y = 6, but -2x + 6y = 12 so we have a problem! Misprint?
2x + 3y = 17 3x + 4y = 24 (2x + 3x) + (3y + 4y) = (17 + 24) 5x + 7y = 41
2x-3y=13
How do you add 2x plus 3y equals 18 in 5x-y equals 11
2x - y = 15 2x + 3y = -21 As you observe both equations (having different slopes), you see that the system is consistent, and it has only one solution.
6x plus 3y minus 2x plus 5y equals 4x plus 8y.