Question

1) 24-(x²+8x-17)=5-5x-x²

2) 19-(3x²-2x)-(6x-x²)=7-2x²
розв'язати рівняння.

Answer 1

Ответ:

1)

$24 - ( {x}^{2} + 8x - 17) = 5 - 5x - {x }^{2} \\ 24 - {x}^{2} - 8x + 17 = 5 - 5x - {x}^{2} \\ 24 - 8x + 17 = 5 - 5x \\ 41x - 8x = 5 - 5x \\ - 8x + 5x = 5 - 41 \\ - 3x = - 36 \\ x = 12$

2)

$19 - (3 {x}^{2} - 2x) - (6x - {x}^{2} ) = 7 - 2 {x}^{2} \\ 19 - 3 {x}^{2} + 2x - 6x + {x}^{2} = 7 - 2 {x}^{2} \\ 19 - 2 {x}^{2} - 4x = 7 - 2 {x}^{2} \\ 19 - 4x = 7 \\ - 4x = 7 - 19 \\ - 4x = - 12 \\ x = 3$