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Equality of 2 Complex Numbers

If 2x-3y=14...

Question

If $2 x - 3 y = 14$ and $5 x + 3 y = 21$ , then the value of $x$ will be.

A

- 1

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B

0

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C

\frac{7}{3}

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D

5

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Solution

The correct option is D $5$
Consider the equations $2 x - 3 y = 14$ and $5 x + 3 y = 21$ .
Adding both the equations,
$∴ 7 x = 35$
$∴ x = 5$

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Similar questions

\frac{x}{5} + 7 = \frac{2 x}{5}

\frac{2 y}{3} - \frac{3 y}{2} = - 1,

then the value of (x – 5y) is

यदि

\frac{x}{5} + 7 = \frac{2 x}{5}

\frac{2 y}{3} - \frac{3 y}{2} = - 1,

तब (x – 5y) का मान है

\frac{1}{2 x} + \frac{2}{3 y} = 10, \frac{3}{2 x} - \frac{5}{3 y} = - 3,

then the value of

\frac{1}{y} - \frac{1}{x}

2^{x} + 3^{y} = 17, 2^{x + 2} - 3^{y + 1} = 5

x

y

2 x - y = 32

5 x + 3 y = 14

x y =

Q. What are values of x and y respectively for the given system of equations?

5 x - 3 y - 8 = 0, a n d 2 x - 3 y - 5 = 0

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