z/.07
x = 7z/100
z+7
-7
z - 7
(2z - 7)(z + 4)
It is an expression in three variables, x, y and z.
(3z + 5)(z -7)
The equation z-19 time 34 is a verbal sentence. This a math problem.
The algebraic expression for 84 divided by the number ( z ) is ( \frac{84}{z} ). This expression represents the quotient of 84 and the variable ( z ).
To write the difference of ( z ) and 8 as an expression, you would subtract 8 from ( z ). This can be expressed mathematically as ( z - 8 ). This expression represents the value obtained when 8 is taken away from ( z ).
34 percent of z is 0.34z
z + 8 - 2 is an expression, not an equation. An expression cannot be solved. At best, you can simplify it to z + 6.