Question

Find the product:
1. (a) - 4(2y + 7

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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−

Explanation:

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