Question

x+y =30 x-y =20 find x​

Answer 1

Answer:

x + y = 30

+ x - y = 20

2x = 50

x = 50/2

x = 25

Answer 2

Answer:

Given ⤵

➡Two equation

➡x+y= 30 and

➡x-y= 20

To find⤵

➡Value of x

Solution⤵

➡let x+y= 30 ... (1) and

➡ x-y= 20 ... (2)

⚫ On adding equation (1) and (2) , we get

➡ x+y= 30

x-y=20

_______

2x= 50

⚫On adding y+(-y) = 0

➡2x= 50

⚫Dividing both sides by 2 , we get

➡2x/2= 50/2

➡x= 25

✅Hence the value of x is 25.

Now putting the value of x in equation (1), we get

➡25+y=30

⚫Subtracting both sides by 25,we get

➡25+y-25=30-25

⚫On solving 25-25= 0

➡y= 5

✅The value of y is 5.

✔Proof of equation ⤵

➡x+y= 30

➡x-y= 20

⚫On putting the value x=25 and y= 5 , we get

➡25+5=30

➡30=30 and

➡25-5=20

➡20=20

Hope this is helpful to you!