4
2y+3y-7y+4=16 -2y=12y=-6Check it-12-18+42+4=16-30+46=1616=16
x=3
y=16 x= -4
If: -x-3y = -4 and 3x+5y = 16 Then: x = 7 and y = -1
(4, 5)
2y+3y-7y+4=16 -2y=12y=-6Check it-12-18+42+4=16-30+46=1616=16
4.34684352143
x=3
y=16 x= -4
If: -x-3y = -4 and 3x+5y = 16 Then: x = 7 and y = -1
4y + 4 = 3y - 5 y = -9
x + 3y = 4 -x + 2y = -4 Simultan eous eq'ns. Eliminate 'x' by adding. 4 Hence 5y = 0 y = 0 When y = 0 Substitute x + 3(0) = 4 x + 0 = 4 x = 4 So the answer as a coordinate pairs is ( x,y) = ( 4,0)
3y + 4z + 12y = 3y -3y -3y ------------------------- 4z + 12y = 0 divide everything by 4 z + 3y = 0 -3y -3y z = -3y
(1, 4)
y=4
(4, 5)
(0,-4)