Question

plz answer this.......................​

Answer 1

Answer:

$\huge\orange {x = 3}$

$\huge\orange {y = - 2}$

Step-by-step explanation:

According to the Q,

$23x + 31y = 7 -----(1)$

$31x + 23y = 47 -----(2)$

(2) + (1):

$> > 31x + 23x + 23y + 31y = 47 + 7$

$> > 54x + 54y = 54$

$> > 54(x + y) = 54$

$>> x + y = 1 -----(3)$

(2) - (1):

$> > 31x - 23x + 23y - 31y = 47 - 7$

$> > 8x + ( - 8y) = 40$

$> > 8x - 8y = 40$

$> > 8(x - y) = 8(5)$

$>> x - y = 5 -----(4)$

(3) + (4):

$> > 2x = 1 + 5$

$> >2x = 6$

$\orange {> > x = 3}$

Subsistute the value of "x" in -----(3)

$> > 3 + y = 1$

$> > y = 1 - 3$

$\orange {> > y = - 2}$

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$\huge\blue{TIP:}$

• In Such Questions where the co-efficients of x and y are interchanged in the two given Equations,
• First , Add both the Equations.
• Then , Subtract both the Equations.
• And Atlast Simplfy both the newly derived Equations.

$\huge\red{HOPE \: IT \: HELPS \: YOU...}$

Answer 2

Step-by-step explanation:

DEAR MATE

X=3

Y=-2

HOPES IT HELP