Answer:
390 but i might be wrong
Step-by-step explanation:
<span>A system of equation can be solved by:
</span>
<span>A.matrix method
C.back substitution
D. inverse method
The correct choices are A, C and D
</span>
Answer:
x = 3.5
Step-by-step explanation:
To solve this you need to solve for x.
This is a two step equation so you need to first subtract 5 from itself and whatever you do to one side of the equation you have to do to the other side as well.
So 5 - 5 = 0
12 - 5 = 7
Then the equation becomes 2x = 12
Now it is a one step equation, so find the inverse operation of multiplication, which is division .
So 2 divided by 2 is 1 which also equals x by itself
7 divided by 2 equals 3.5
So x = 3.5
Answer:
The number is : 20
Step-by-step explanation:
Thanks alot
