2x + 3 = x + 1
Subtract x from both sides: x + 3 = 1
Subtract 3 from both sides: x = -2
2x + 2 = 4x -1 2x = 3 x = 1.5
6x + 3 = 2x + 5 4x = 2 x=1/2
2x+8 = 6 2x = 6-8 2x = -2 x = -1
21
2x - 4x + 3 = 0 -2x + 3 = 0 2x = 3 x = 3/2 = 1.5
(-1, 3)
2x + 3y = 1 y = 1/3 - 2x/3
(1, 1)
x = 1 ------------- 3 = 2x + 1 -1 -1 2=2x /2 /2 1=x
1
Both equations are equal and so: 3x+1 = 2x+3 3x-2x = 3-1 x = 2 and by substituting y = 7
(2, 1)
2x +1 = 5x-2 2x +3= 5x 3 = 3x x=1
2x + 2 = 4x -1 2x = 3 x = 1.5
(3, 1)
(4, -1)
(-1, 0)