Question

7x + 3y = 25, -2x + y = 4​

Answer 1

Answer:

x=25/13 and y=50/30

Step-by-step explanation:

multiply 7x + 3y =25 by 2 and multiply -2x + y=0 by 7 solve by elimination method to get value of y and then put in anyone equation to get answer

Answer 2

Answer:

Solution (x, y) = (1, 6)

Step-by-step explanation:

7x + 3y = 25 _____(1)

-2x + y = 4 ______(2)

Multiplying equation (2) by 3

3(-2x + y = 4)

-6x + 3y = 12 ______(3)

Subtracting equation (3) from (1)

7x + 3y = 25

–

-6x + 3y = 12

____________

13x = 13

x = 13/13

x = 1

Substituting the value of x in equation (1)

7x + 3y = 25

7(1) + 3y = 25

7 + 3y = 25

3y = 25 - 7

3y = 18

y = 18/3

y = 6