Question

If 2 upon 7+5 upon x is equal to -17 then find the value of x

Answer 1

Answer:

ANSWER

Given equations as :

 27x+25y=5...(1)

4x+2y=7...(2)

From equation (1) we have value of y:

⇒7x+5y=10

⇒5y=10−7x

⇒y=510−7x

Substitute value of y in second equation will have x value:

4x+2(510−7x)=7

⇒20x+2(10−7x)=35

⇒20x+20−14x=35

⇒6x=15

⇒x=25

Now replacing x value in equation 2nd will get y value

4(25)+2y=7

⇒20+4y=14

⇒4y=14−20

⇒4y=−6

⇒4y=−6

⇒y=4−6

y=2−3

Now x−