First u have to expand the brackets...
4 x 2z = 8z
4 x 3 = 12
8z + 12 = 12
Then you have to get numbers on one side, and letter on the other...
8z -12 = 12-12
8z = 0
then u have to divide 8z by 8 to find 1z or just z.
z = (0/8) = 0
z=0
Hope this helps :)
Answer:
none of them.
Step-by-step explanation:
The substitution property of equality explains that one value can replace another value in an expression or equation and the value will remain the same.
In other words if x + y = 7 and y = 5. Then I can rewrite the first statement as x + 5 = 7.
which can be solved to get x = 2. I just used the substitution property.
The first choice is the multiplicative identity property. Multiplying an expression by 1 gives the same result.
The second and third choices are wrong since 13 is not equal to 14 and neither is 13 equal to 6
The fourth choice is the additive identity property since adding zero to an expression gives the same result.
Good Luck!
Answer:
Step-by-step explanation:
3 pounds:7 dollars
1 pound: 2.33 dollars
divide 3 by 3 to find 1. divide 7 by 3.
The like terms would be the numbers that are the same.
9 and 3
Negative z and negative 2z
Hope I helped :)
