Question

PLZ GIVe AnS. ...
{Irrelevant Ans = ur 30 ans will be reported }

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Answer 1

Answer:

x

$x = - 2 \\ y = 3$

Step-by-step explanation:

FIRST WE MULTIPLY EQN 1 WITH 5 AND EQN2 WITH 3

SO EQN 1 WILL BE

$10x + 15y = 25$

Eqn 2 will be

$12x + 15y = 21$

EQN 2-EQN1

$2x = - 4 \\ x = - 2$

and y will be

3

Answer 2

Given :

➠ 2x + 3y = 5 ....... (i)

➠ 4x + 5y = 7 ........(ii)

To find :

The value of x and y.

Solution :

Mutiplying equation (i) by 4

Mutiplying equation (i) by 4 And equation (ii) by 2

We will get :

Equation (i) as :

= 4(2x + 3y = 5)

= 8x + 12y = 10 ......(i)

And, also

Equation (ii) as :

= 2(4x + 5y = 7)

= 8x + 10y = 14 ......(ii)

Procedure :

Subtraction of both the equation as follows :

$\cancel{8x} + 12y = 10 \\ { \underline{ \cancel{- 8x} - 10y = - 14}} \\ \implies 2y = - 4 \\ \implies \: y = \frac{ \cancel{ - 4}}{ \cancel2} \\ \to y = - 2$