7n = 7
divide by 7 on both sides
n = 7
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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.
3n + 4n = -14 7n /7 = -14 /7 n = -2
7n = 28n = 28/7 = 4
7n - 11n = 3n + 9 Collecting all the terms with n on the left, (7-11-3)n = 9 -7n = 9 Divide both sides by -7 to give n = -9/7
in an equation it would be 7n>42 (divide both sides by 7) = n>6