Move all the digit of R.H.S on L.H.S one by one by changing sign and get the value of variable.
Take Nehas age as x and Ushas age as x+20. Then form the equation.
make an equation
Let the additional kilometres be x and find out the value of x and then add 1 to it for the first km.
Use the concept of linear equations.
The required equation is:
2x + (2x + 2) + (2x + 4) = 18
Use hit and trial method to complete the equation.
Form a linear equation from the given data.
make equations first and then try to solve
Let the largest side is x, then form an equation and find the value of x. Perimeter is sum of all the sides.
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