Question

please give me the answer by substitution method​

Answer 1

Step-by-step explanation:

3y-5z=4

3y=4+5z

y=(4+5z)/3

now, 2nd equation

9y-2z=7

now substituting the value of y in the 2nd equation

9×((4+5z)/3)-2z=7

3×(4+5z)-2z=7

12+15z-2z=7

13z=-5

z=-5/13

now y

3y-5(-5/13)=4

3y+(25/13)=4

39y+25=52

39y=52-25

39y=27

y=27/39

Answer 2

Hope this helps you ☺️☺️☺️