Question

`{x}^(2) - 4x = 7 {x}^(2) + 8x \\ find \: x`
please fast okkkkkk​

Answer 1

`{x}^(2) - 4x = 7 {x}^(2) + 8x \\ {x}^(2) - 7 {x}^(2) = 8x + 4x \\ - 6 {x}^(2) = 12x \\ - 6x = 12 \\ x = (12)/( - 6) = - 2 \\ x = - 2 \\ thank \: you`