(2, -1)
(4, -1)
3x + 2y = 7
3x-2y-7=0
Multiply the first equation by -3
3x+2y = 1 2y = -3x+1 y = -1.5x+0.5
3x+2y-5=0 3x+2y=5 Im lost im only 12 work out the rest hope i helped
(4, -1)
-3x + 2y = 9 2y = 3x + 9y = 1,5x + 4,5
3x + 2y = 7
3x-2y-7=0
Multiply the first equation by -3
3x+2y=9 2y=9-3x y=-1.5x-4.5
3x+2y = 1 2y = -3x+1 y = -1.5x+0.5
3x+2y=6 2y=-3x+6 y=-1.5x+3
3x = 2y + 7 The standard form is: 3x - 2y - 7 = 0
y=2.5 and x=5
3x + 2y = 8 This is an equation. It could be the equation of a line.
3x + 2y = 12 ie 2y = 12 - 3x so y = 6 - 3x/2
4x-y=2, thereforey=4x-2sub y into 3x+2y=6...3x+8x-4=611x=10x=10/11
The equation can be simplified to show a value of Y in terms of X. 3X + 2Y +2 = 4Y + 4 3X + 2 = 2Y + 4 3X -2 = 2Y and 2Y = 3X - 2 means that Y = (3/2 X) -1
There are 2 unknowns
If: 3x+2y = 5x+2y = 7 Then: 3x+2y = 7 and 5x+2y = 7 Subtract the 1st equation from the 2nd equation: 2x = 0 or x = o By substitution: x = 0 and y = 3.5
3x + 5 + x + 10 + 2y 4x + 2y + 15 |:2 2x + y + 7.5 2x + y + 7.5 is equivalent to the original.
x = 4 and y = -1 (4. -1)
The values are: x = -6 and y = 10