Question

Resolva as equações:
a) 3 . (x - 1) - 2 . (X + 3) + 5 . (2 - x) = - 7
b) 3 . (2 - 4 . (X- 1) - 3 ) + 2 . (X- 1) = 0

Answer 1

Resposta:

a) X = - 3/2

b) x = - 1/2

Explicação passo-a-passo:

b) 6-12x+12-9+2x-2=0

-12x+2x=0-6+9+2

-10x= -6+11

-10x= 5 (-1)

10x= -5

x= -5/10

x= -1/2

a)3x-3-2x-6+10-5x=7

3x-2x-5x=7+3+6-10

3x-7x=6

-4×=6 (-1)

+4x= -6

x=-6/4

x= - 3/2