Question

solving y-z=4and 3y-4z=9​

Answer 1

Answer:

y=7 , z=3

Step-by-step explanation:

y=4+z from first equation

put y=4+z in second equation

3(4+z)-4z=9

12+3z-4z=9

-z=9-12

-z=-3

z=3

put value of z in first equation

y=4+3

y=7