Question

Example 2: Solve the following pair equations by substitution method
7x-15y=2
x+2y=3
​

Answer 1

Given equations are

7x−15y=2...(i)

x+2y=3....(ii)

from eq

n

....(ii),

x=3−2y....(iii)

On substituting x= 3 -2y in eq

n

(i) we get

⇒7(3−2y)−15y=2

⇒21−14y−15y=2

⇒21−29y=2

⇒−29y=−19

y=

29

19

Now on putting y=

29

19

in eq

n

(iii), we get

⇒x=3−2(

29

19

)

⇒x=3−

29

38

⇒x=

29

87−38

⇒x=

29

49

Thus, x=

29

49

and y=

29

19

is the required

Answer 2

Step-by-step explanation:

3⁶"&-;';; kvckvgxgjxkg