-7(n+9)-(7+2n)=-10n
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-7(n+9)-(7+2n)=-10n
First, expand;
Then, move all the terms in n on the same side;
Can you take it from there?
Your answer should be 70
Just multiply the number outside the parantheses with the one inside:
-7n-63-7-2n = -10n
Group the same number together (n with n and without n with without n):
-9n -70 = -10 n
Then, solve for n:
-9n + 10 n (the sign change as you bring it to the other side) thus,
-9n + 10n = 70
n = 70
But... but... what's the pointof posting is the question is already more than a week old? And the question already answered? :confused:
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