Question

substitute4x-5y=9 ; 8x-10y=18​

Answer 1

Answer:

Solve equation [2] for the variable y

[2] 10y = 8x - 18

[2] y = 4x/5 - 9/5

// Plug this in for variable y in equation [1]

[1] 4x - 5•(4x/5-9/5) = 9

[1] 0 = 0 => Infinitely many solutions