Question

Alguém sabe fazer isso?

Answer 1

a) 3. (x - 2 ) + 2 . (4 x - 3 ) - 5 (2 - x) = 6 . (x + 3 ) + 2 x
3 x - 6 + 8 x - 6  - 10  + 5 x = 6 x + 18 + 2 x
3 x + 8 x + 5 x - 6 - 6 - 10  = 6 x + 2 x + 18
16 x - 22 = 8 x + 18
16 x - 8 x = 18 + 22
8 x = 40
x = 40/8
x = 5
b)(1 - 3 x) / 2 + (x + 7 )/3 = (5 - 2 x)/4
m.m.c = 12
6 ( 1 - 3 x) /12 + 4( x + 7 ) /12 = 3 ( 5 - 2 x )/12 eliminamos o denominador
6(1 - 3 x ) + 4( x + 7 ) = 3( 5 - 2 x )
6 - 18 x + 4 x + 28 = 15 - 6 x
-18 x + 4 x + 28 + 6 = 15 - 6 x
-14 x + 34 = 15 - 6 x
- 14 x + 6 x = 15 - 34
-8 x = - 19 
x = -19/ - 8
x = 19/8