if (4x²-3y²) : (2x²+ 5y²) = 12 : 19, then (x : y) is :
Answers
Answer:
Step-by-step explanation:Given two equations, 2x + y = 23 and 4x - y = 19.
Let's add both the equations to eliminate 'y' value and find out 'x' value.
4x - y = 19
+ 2x + y = 23
--------------------------------
6x = 42
x = 7
Now let's substitute 'x' value in any of the given equations
2 (7) + y = 23
14 + y = 23
y = 9
Now let's substitute 'x' and 'y' values in the given expressions
x - 3y = 7 - 3 (9)
= 7 - 27
= -20
5y - 2x = 5 (9) - 2 (7)
= 45 - 14
= 34
∴ The values of x - 3y and 5y - 2x are -20 and 34 respectively.
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