Question

find the solution of the following pair of linear equation....

2x + y = 7
and
x + 2y = 8​

Answer 1

Answer:

x = 2, y = 3

Step-by-step explanation:

2x + y = 7 ...... Equation 1

x + 2y = 8 ..... Equation 2

Multiply equation 2 by 2,

2x + 4y = 16 .... Equation 3

Subtract equation 1 from equation 3,

2x + 4y = 16

- 2x + y = 7

We get,

3y = 9

y = 9/3

y = 3

Substituting y = 3 in equation 2,

x + 2(3) = 8

x = 8 - 6

x = 2

(2, 3) is the solution