Elena merge la piață cu 7 lei.Calculați câte kg de mere poate cumpăra ,dacă 1kg de mere costa 2,50 lei .Ce rest primește ?
1 answer:
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Answer:
The two numbers are 9 and 5.
Step-by-step explanation:
The question is:
The sum of two numbers is 14, adding 1 to the greatest gives twice the smallest which are the two numbers. if it can be explained please
Solution:
Denote the two numbers by <em>x</em> and <em>y</em>.
It is provided that:
Also,
Solve the equations (i) and (ii) by the substitution method as follows:
In equation (ii) substitute <em>x</em> = 14 - y and solve for <em>y</em>:
Substitute <em>y</em> in equation (i) and solve for <em>x</em> as follows:
Thus, the two numbers are 9 and 5.
This is called the "Additive Identity Property (of Addition)". Any number plus or minus 0 is still that number.
This is reflected in the second equation here.