Question

-8n-(4n-6r) если r-2n=11

Answer 1

-8n-4n+6r=-12n+6r=6(r-2n)
6(r-2n)=6x11=66

Answer 2

To simplify the expression -8n - (4n - 6r) given that r - 2n = 11, we first need to substitute the value of r in terms of n from the second equation into the first equation.

Given: r - 2n = 11

To solve for r, we isolate it on one side:

r = 11 + 2n

Now, we'll substitute this value of r into the expression -8n - (4n - 6r):

-8n - (4n - 6r) = -8n - (4n - 6(11 + 2n))

Next, distribute the -6 into the parentheses:

-8n - (4n - 6(11 + 2n)) = -8n - 4n + 66 + 12n

Now, combine like terms:

-8n - 4n + 66 + 12n = (12n - 4n - 8n) + 66

Simplify further:

(12n - 4n - 8n) + 66 = 0n + 66

Since any number multiplied by zero is zero, we have:

0n + 66 = 66

So the simplified expression is 66.