Question

substitution
method
3x + Бу =0
5х - 7у =0
​

Answer 1

Step-by-step explanation:

3x + 6y =0.........(1)

5x - 7y=0............(2)

from equation (2)

5x - 7y =0

5x = 7y

x = 7y/5........(3)

using equation (3) in equation (1)

3×7y/5 + 6y =0

21y/5 + 6y =0

multiplying both side by 5

21y + 30y = 0

51y =0

y = 0/51

y =0

using the value of y in equation (1)

then x =0