2 less than one eighth of Vinay’s age x equals 5 can be expressed as
x/8 -2 = 4
x/8 + 2 = 4
8x -2 = 4
8x+2=4

2 less than one eighth of Vinay’s age x equals 5 can be expressed as
x/8 -2 = 4
x/8 + 2 = 4
8x -2 = 4
8x+2=4

One third of a number n added to 4 gives 13 can be expressed as
3n +4=13
n/3+4=13
n/3-4=13
3n-4=13​

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