Question

If 4 is added to a number and the sum is multiplied by 3,the result is 30.Find the number.

Answer 1

Hint: Take the unknown number as a variable.Then create an equation using the above condition.Solve it to get the result.

Complete step-by-step answer:
Step1:Let us assume that the number is x(say).
Step2: 4 is added to a number.Then it becomes $$(x+4)$$
Step3:Then the sum is multiplied by 3.Now it becomes $$3 \times (x+4)$$
Step4:Given the result is 30.Hence, $$3(x+4)=30$$
Step5:Now solve it.
 $\eqalign{
  & 3 \times (x + 4) = 30 \cr
  & \Rightarrow x + 4 = \dfrac{{30}}{3} \cr
  & \Rightarrow x + 4 = 10 \cr
  &\Rightarrow x = 10 - 4 \cr
  &\Rightarrow x = 6 \cr} $
Therefore,the required number is 6.

Note: For solving such types of solutions,we have to create an equation using the given conditions,then solve it to get the actual result.