Question

if 3x-y=27 and 3x+y=243 then find the valve of x

Answer 1

Answer:

hii

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Step-by-step explanation:

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Here is your answer ✓ ✓ ✓ ✓

3x - y = 27 ---------(1)

And,

3x + y = 243 ----------(2)

From equation (1) we get

3x - y = 27

3x = ( 27 + y)

x = ( 27 + y /3) ---------(3)

Putting the value of X in equation (2) , we get

3x + y = 243

3 × ( 27 + y /3) + y = 243

27 + y + y = 243

2y = 243 - 27

2y = 216

y = 216/2

y = 108

Putting the value of y in equation (3 ) , we get

x = ( 27 + y /3)

x = ( 27 + 108/3) = 135/3

x = 45

Hence,

X = 45 and Y = 108

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Answer 2

Step-by-step explanation:

3x=27+y

3x=243-y

equate both equation

27+y=243-y =108

y=108

so x= 3x-y =27

3x-108=27

x=45

hope it helps you mate...