Answer:
31
Step-by-step explanation:
Answer:


Step-by-step explanation:
Given :
...................... equation 1
........................ equation 2
solving the system of linear equation by substitution method , substitute equation 1 into equation 2 , that is



collect the like terms

therefore :

substitute
into equation 1 to find the value of y , that is


Therefore :


Post war means the time after a war had just taken place
Her is your answer 3% of the sales is $180
If the sales is called 's' we can write an equation to model the statement 3% of the sales is $180:
The amount of sales is $6,000.
Your final answer is $6,000 in sales.