y=16 x= -4
4y+2 = 2y+6 4y-2y = 6-2 2y = 4 y = 2
many solutions
2y + 4 = 3ySubtract 2y from both sides:4 = ywhew
4x+2y = 20 2y = -4x+20 y = -2x+10
4y = 2y + 40 4y - 2y = 2y -2y +40 2y = 40 y = 20 check 4(20) = 2(20) +40 80 = 80
y=16 x= -4
2y = 4x + 4y = 2x + 2
you can not solve this equation
4y+2 = 2y+6 4y-2y = 6-2 2y = 4 y = 2
many solutions
2y + 4 = 3ySubtract 2y from both sides:4 = ywhew
4x+2y = 20 2y = -4x+20 y = -2x+10
3x + 2y = 12 ie 2y = 12 - 3x so y = 6 - 3x/2
3x + 2y = 4; 2x - 2y = 16 Add; 5x = 20 so x = 4 and y is therefore -4
3x+2y=6 2y=-3x+6 y=-1.5x+3
Subtract by 7x and divide by 2.