Question

Alguem me ajuda a resolver essas contas
2x+4=x-16
7(x-1)=2 (x-3)
X+9x+8=0
3x-15x+12=0

Answer 1

2x+4 = x-16 | 2x-x = -16-4 | x = -20
7(x-1) = 2 (x-3) | 7x-1 = 2x-6 | 7x-2x = -6+1 | 5x = -5 | x = -1
x+9x+8 = 0 | 10x+8 = 0 | 10x = 0-8 | 10x = -8 | x = -8/10
3x-15x+12 = 0 | 3x-15x = 0-12 | -12x = -12 | -x = -1 | x = 1
Espero ter ajudado