Linear Equation...

On a three day hiking trip you hiked the same distance (in km) on both first and second days.You hiked $$5$$ km on the third day. If you hiked a total of $$19$$ km, how many kilometer were left to hike after the first day?

Find two consecutive even whole numbers, whose sum is $$38$$.

Solve: 

You are decorating a gift pack with $$15$$ flowers. You want an equal number of flowers in each of the $$3$$ rows on the gift pack. Which equation would you use to find the number of flowers, $$r$$ in each row?

If a number with $$12$$ has the same ratio as $$8$$ having with $$10$$, then the number is : 

Which of the following equation is not a linear equation?

The three even consecutive integers whose sum is 90 are

A is 2 years older than B who is twice as old as C If the total of the ages of A, B and C be 27 years then how old is B?

The sum of the ages of 5 children born at intervals of 3 years each is 50 years What is the age of the youngest child?

A number is doubled and 9 is added If the result is trebled it becomes 75 What is that number?