9 taken away from the sum of y and z.
y+z+9
9-y+z
y+z-9
9y+z
9 taken away from the sum of y and z is written as y+z-9.
Write the following in mathematical form using signs and symbols :
x taken away from the sum of yand z.
Subtract 3x−4y−7z from the sum of x−3y+2z and −4x+9y=11z.