Question

with the method of method substitution find X and Y question is 3 x minus 4 Y is equal to 15 and 2x + 7 Y is equal to 9​

Answer 1

Answer:

x=19  y=3

Step-by-step explanation:

3x-4y=15          (1)

2x+7y=9          (2)

3x=15+4y

x=19/3y                 (3)

2(19/3y)+7y=9

38/3y+7y=9

38-21/3y=9

9/3y=9

y=9*3/9

y=3

x=19/3(3)

x=19