Question
Solve the system of equation by using elimination:
Hint:
Let and now we get the equation in a and b
Now find values of a and b .After finding a and b substitute them in and and find the values of x and y .
The correct answer is: x = 8 ; y = 4
Ans :- x = 8 ; y = 4
Explanation :-
Let now we get the equation in a and b
— eq1
— eq2
Step 1 :- find value of b by eliminating a
Do 2(eq2) - 7(eq1) to eliminate a
∴ b = 1/4
Step 2 :- find value of a by substituting b=1 in eq1
∴ a = 1/8
Step 3 :- substitute a and b in and find values of x and y
x = 8 and y = 4 is the solution to the given pair of equations.
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Note:
There are many other units of length which are often used. For example: inch, foot, yard, centimetre, parsec, lightyear, nanometre, etc. They measure anything between atoms to a galaxy.
Some relations between them are given by
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