Question

×+2×-1-3=x me ajudem

Answer 1

x+2x-1-3=x
3x - 1 - 3 = x
3x = 1 + 3 + x
3x - x = 4
2x = 4
x = 4 / 2
x = 2

Answer 2

Separando os termos semelhantes:
X + 2x -x = 3 +1
2x = 4
X = 4/2
X = 2