1 - 7n = 15 - 5n
Add 5n to each side: 1 - 7n + 5n = 15 -5n + 5n
ie 1 - 2n = 15; subtract 1 from each side: -2n = 14
divide both sides by -2: n = -7
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5n+15 = 25 5n = 25-15 5n = 10 n = 2
5n + 15 = 25 you subtract 15 from both sides then you get 10 then divided 5n by 10 you get 2n
5n-2+2=4n 5n=4n n=0
-5n+9=-46 -5n+9-9=-46-9 -5n=-55 -5n/-5=-55/-5 n=11
In the equation 5n-11=4n+20, n is equal to 31.