Question

solve the following pair of equations: 3x−y=23, 3 x ​ + 4 y ​ =4​

Answer 1

Step-by-step explanation:

ANSWER

We pick either of the equations and write one variable in terms of the other.

Let us consider the equation 3x−y=23 and write it as

y=3x−23...........(1)

Substitute the value of y in Equation

3

x

+

4

y

=4 or 4x+3y=48. We get

4x+3(3x−23)=48

i.e. 4x+9x−69=48

i.e. 13x=117

i.e. x=9

Therefore, x=−9

Substituting this value of x in equation 1, we get

y=27−23

i.e. y=4

Hence, the solution is x=9,y=4.