Question

x-2y=1; 2x-y=7 solve the following simultaneous equation

Answer 1

HELLO MATE ☺☺
___________________________⭐⭐⭐

⏩x-2y = 1 --------(i)
⏩2x-y = 7 -------(ii)

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USING SUBSTITUTION METHOD:

From equation (i)
x- 2y = 1
x = 1+2y -------(iii)

PUtting x = 1+2y in eq.(ii)
2x-y = 7
2(1+2y) - y = 7
2 + 4y - y = 7
2 + 3y = 7
3y = 7 - 2
3y = 5
y = 5/3

Putting the value of y in eq.(iii)
x = 1+2y
x = 1 + 2(5/3)
x = 1 + 10/3
x = 3+10/3
x = 13/3
So,
$x = \frac{13}{3} and \: y = \frac{5}{3}$
____________________________⭐⭐⭐
HOPE IT HELPS UH✌
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Answer 2

Answer:

HELLO MATE ☺☺

___________________________⭐⭐⭐

⏩x-2y = 1 --------(i)

⏩2x-y = 7 -------(ii)

===================

USING SUBSTITUTION METHOD:

From equation (i)

x- 2y = 1

x = 1+2y -------(iii)

PUtting x = 1+2y in eq.(ii)

2x-y = 7

2(1+2y) - y = 7

2 + 4y - y = 7

2 + 3y = 7

3y = 7 - 2

3y = 5

y = 5/3

Putting the value of y in eq.(iii)

x = 1+2y

x = 1 + 2(5/3)

x = 1 + 10/3

x = 3+10/3

x = 13/3

So,

____________________________⭐⭐⭐

HOPE IT HELPS UH✌

^_^

Step-by-step explanation: