3z-5
72xy^(3)
-47 + 6z = 3z-2-3z -3z-47 + 3z = -2+47 +473z = 45/3 /3z = 15
2b
A numerical expression is ' 2 + 3' A numerical equation is ' 2 + 3 = 5'.
If you mean: 33z-4-20z-5 then it is 13z-9 when simplified
3z-5
72xy^(3)
4-3 = 1
- - x + 3 = x + 3
Add like terms to like: (2z - 20) + (3z + 5) = (2z + 3z) + (-20 + 5) = 5z - 15 2z is shorthand for z+z, 3z is shorthand for z+z+z, so: 2z + 3z = (z+z) + (z+z+z) = z+z+z+z+z = 5z Or, to put it another way, just add the coefficients: 2z + 3z = (2+3)z = 5z.
3x+3-2x=3 x+3=3 x-0
-47 + 6z = 3z-2-3z -3z-47 + 3z = -2+47 +473z = 45/3 /3z = 15
(3+2i)-(3+2i)
2b
No
don't answer that