Question

por favor me ajudem

Answer 1

(x+1)*2 - x*2 = 7
x*2 + 2x + 1 - x*2 = 17
2x + 1 = 17
2x = 17 - 1
2x = 16
x = 16 / 2
x = 8


(x-4)*2 = x*2 - 40
x*2 - 8x + 16 - x*2 = - 40
- 8x = - 40 - 16
- 8x = - 56 · (-1)
8x = 56
x = 56 / 8
x = 7


4(x+2)*2 = (2x-3)*2
4(x*2 + 4x + 4) = 4x*2 - 12x + 9
4x*2 + 16x + 16 - 4x*2 + 12x = 9
28x = 9 - 16
28x = - 7
x = - 7 / 28
x = - 1 / 4



x(x+5) = (x+1)*2 + 26
x*2 + 5x = x*2 + 2x + 1 + 26
x*2 - x*2 + 5x - 2x = 27
5x - 2x = 27
3x = 27
x = 27 / 3
x = 9