36
It is the same as 8y+8z
Z is a constant variable in this equation. A constant variable is a variable, the value of which can never change. In this case, z would be equal to 7.
Twenty three fewer than a variable represented by z.
Ten z plus one, or ten z plus ten. That depends on where you had parentheses in the original expression: (10 * z) +1 = 10z + 110 * (z + 1) = 10z + 10
36
z + 8 Replace words with their mathematical equivalent. Leaves variables and numbers as is. Plus means add, so z plus 8 becomes z + 8.
z + 8 - 2 is an expression, not an equation. An expression cannot be solved. At best, you can simplify it to z + 6.
The expression has no solution but it can be simplified to: z+6
There are 4.
It is the same as 8y+8z
As an expression it is: 8z+6.5y
There is no simple, automated, way to do this; you just have to do an effort to understand the problem.
In the algebraic expression above z is an unknown variable.
z - 7
It is: z-8
Actually, 2x + 3y + z is an expression, because it is a mathematical noun.