Question

Escreva as equacoes na forma geral e resolva
2
A) X=7x-12

2
B) 2x-3x=2x-1



C) 2x.(4x-1)=21


2
D) X-7X+10=0


2
E) 2X-10X-12=0

Answer 1

a) × - 7× - 12 = 0
- 6× - 12 = 0
- 6× = 12
× = 12/-6
× = - 2

b) 2× - 3× = 2× - 1
2× -3× - 2× + 1 = 0
- 3× + 1 = 0 vezes (-1)
3× - 1 = 0
3× = 1
× = 1/3

d) × - 7× + 10 = 0
- 6x + 10 =0 ( -1)
6× - 10 = 0
× = 10/6 (simplifica por 2)
× = 5/3

e) 2× - 10× - 12 = 0
- 8× - 12 = 0 ( - 1)
8× + 12 = 0
x = 12/8 (simplifica por 4)
× = 3/2