Best Answer

- n = 7

multiply through by, - 1

- 1(- n = 7)

a negative times a negative is positive ( and, of course, a negative time a positive is negative )

n = - 7

======check

- (- 7) = 7

( negative times negative = positive )

7 = 7

----------checks

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Q: What is the solution to the equation -n equals 7?

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3 (n + 7) = 16

It is a linear equation in one unknown variable, n. Its solution is n = 1

63

n + 16 = 9 n + 16 - 16 = 9 -16 (add 16 to both sides, the equation remains same) n + 0 = -7 n = -7

7 + n = 14 n = 7

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3 (n + 7) = 16

7n = 7 divide by 7 on both sides n = 7

7n = 245To isolate n, divide both sides of the equation by 7.n = 245 / 7n = 35Check:L.S. = 7nL.S. = 7(35)L.S. = 245R.S. = 245L.S. = R.S.245 = 245The equation is true, so the solution is n = 35.

7/8 = 14/nMultiply each side of the equation by 8 :7 = 112/nMultiply each side by 'n' :7n = 112Divide each side by 7:n = 16

It is a linear equation in one unknown variable, n. Its solution is n = 1

63

2+n-3 = 6 n = 6+3-2 n= 7

n=-32