-4(7x-3y-z)-(-6)(9x-z+2)
3y+2z
It is y+3y-2y = 2y simplified
Then 3y+1-2y can be simplified to y+1
2y + 4 = 3ySubtract 2y from both sides:4 = ywhew
-4(7x-3y-z)-(-6)(9x-z+2)
3y+2z
5x+2x-3y+y = (5+2)x+(-3+1)y = 7x - 2y
3y - 3 = 2y + 5 3y - 2y = 5 + 3 y = 8
It is y+3y-2y = 2y simplified
X + 3y - 2y + 3y = X + (3-2+3)y = X + 4y
5x + (3y-x) + (10-2y) = 5x + 3y - x + 10 -2y = 5x - x + 3y - 2y + 10 = 4x + y +10
2y + 3 = 3y + 9 2y - 3y = 9 - 3 or -y = 6 so y = -6
Then 3y+1-2y can be simplified to y+1
5y-2y= 3y+2 5y-2y-3y= 2 0y= 2
-3y + y = -2y
2y + 4 = 3ySubtract 2y from both sides:4 = ywhew