Question

!!!please for the love of God help me!!!

Answer 1

Given :-

• x=y-1
• x+2y=8

To find:

• Value of x
• Value of y

Solution:-

Let say it is first equation:-

x=y-1. . . . (1)

and this is second equation:-

x+2y=8 . . . . (2)

Simplifying 1 equation:-

• x = y - 1
• x +1 = y
• y = x + 1

Put this value of y in second equation.

$\dashrightarrow \sf \: x+2y=8$

$\dashrightarrow \sf \: x+2(x + 1)=8$

$\dashrightarrow \sf \: x+2x +2=8$

$\dashrightarrow \sf \: 3x +2=8$

$\dashrightarrow \sf \: 3x=8 - 2$

$\dashrightarrow \sf \: 3x=6$

$\dashrightarrow \sf \: x=6 \div 3$

$\dashrightarrow \sf \: x= \bf2$

to find value of y :-

y = x + 1

y = 2 + 1

y = 3

verification:-

1 equation:-

x = y - 1

put value of x and y

2 = 3 - 1

2 = 2

LHS = RHS

Hence verified!

2 equation:-

• x+2y=8

put value of x and y

• 2 + 2 × 3 = 8
• 2 + 6 = 8
• 8 = 8

LHS = RHS

Hence verified!

Both equation verified!

.°. value of x and y is 2 and 3 respectively