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liberstina [14]
3 years ago
10

-2(2n+4)=10 solve the equation

Mathematics
2 answers:
grigory [225]3 years ago
7 0
-2(2n+4) = 10
distribute the -2 through the parentheses
-4n - 8 = 10
begin to isolate n by adding 8 to each side
-4n = 18
finish isolating n by dividing both sides by -4
n = 18/-4 = -4 1/2
rosijanka [135]3 years ago
7 0
The answer is -4 \frac{1}{2}
First, we need to simplify the equation in parentheses
So we multiply (2n+4) by -2 which will get us -4n-8.
The equation now is -4n-8=10
Now we isolate the variable
Lets add the 8 to both sides of the equation
-4n-8+8=10+8
You will get -4n=18
Now divide -4n with -4 and divide 18 with -4 to "isolate the variable"
You would get n=18/-4
Simplify 18/-4 and you would get -4 \frac{1}{2}
N= <span>-4 \frac{1}{2}</span>
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