Question

Solve by substitution method
{3x+4y=1
{x-12=y

Answer 1

Answer:

The Correct answer is: x = 7, y = -5

Step-by-step explanation:

3x+4y = 1

x-12 = y

put the value of y in equation 1

3x + 4(x-12) = 1

3x + 4x-48 = 1

7x = 1+48

7x = 49

x = 7

Now, put the value of x in equation 2

x-12 = y

7-12 = y

y = -5

Answer 2

Answer:

Step-by-step explanation:

in substitution method , we have to put the value of variable from any of the given equation in the other one.

in this question lets take the second equation

x-12=y

x=12+y

now , put the value of x in the other equation

i.e. 3x + 4y = 1

     3(12+y) + 4y = 1

36 + 3y + 4y = 1

36 + 7y = 1

7y = 1-36

7y =-35

y  = -5

now put the value of y in 1st equation

x-12=y

x-12=-5

x=-5+12

x=7

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