Yes they do.
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-2x/3 - 5 = 5 Add 5 to both sides: -2x/3 = 10 Multiply both sides by 3: -2x = 30 Divide both sides by -2: x = -15
4n-3=5 add 3 both sides 4n=8 divide by 4 both sides n=2
First you subtract 3x from both sides and get -7=2x+3. Then subtract 3 from both sides and get -10=2x. Then divide both sides by 2 and x=-5.
2 + 4/a = 14/a - 3 Add 3 to both sides: 5 + 4/a = 14/a Subtract 4/a from both sides: 5 = 10/a Multiply both sides by a: 5a = 10 Divide both sides by 5: a = 2
n/5 = (n+1)/3 multiply both sides by 5 n = (5n + 5)/3 multiply both sides by 3 3n = 5n + 5 subtract 3n from both sides 0 = 2n + 5 subtract 5 from both sides -5 = 2n divide both sides by 2 n = -2.5