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Therefore,

2 x + 5 = 15 + 14

Now we need to simplify further the right hand side of the equation,

Therefore

2x + 5 = 29

Subtract 5 from both sides of the equation

Therefore,

2x + 5 -5 = 29-5

2x = 24

Now we have to divide both sides of equation by 2 to get the final value of unknown variable x

Therefore 2x/2 = 24/2

So x = 12

Hence the value of unknown variable in this equation 2x+5 = 60/4 + 140/10 is 12.

Therefore,

3 x + 5 = 25

Subtract 5 from both sides of the equation

Therefore,

3x + 5 -5 = 25-5

3x = 20

Now divide both sides of the equation by 3

Therefore 3x/3 = 20/3

Hence x = 20/3