Question

Equaçao - simplofique e resolva as equaçaoes :
A)4x-3-x+8=11 b)6.(x-2)=12 c) 9+2 .(5x4)=21 d)10x+4.(3-2x)-6=8 e) 3.(5+3x)+5.(-x-1)=22 f)2.(9x-4)-7+(6-5x).3=18

Answer 1

a) 4x - 3 - x + 8 =11
4x - x = 11 + 3 -8
3x = 6
x = 6/3
x = 2

b) 6 . ( x - 2 ) = 12
6x - 12 = 12
6x = 12 + 12
6x = 24
x = 24/6
x = 4

c)9 + 2 . ( 5x + 4 ) = 21
9 + 10x + 8 = 21
10x = 21 - 9 - 8
10x = 4
x = 4/10 dividido por 2 =
x = 2/5

d) 10x + 4 . ( 3 - 2x ) - 6 = 8
10x + 12 - 8x - 6 = 8
10x - 8x = 8 - 12 + 6 
2x = 8 - 6
2x = 2
x = 2/2
x = 1

e) 3 . ( 5 + 3x) + 5 . ( - x - 1 ) = 22
15 + 9x - 5x - 5 = 22
9x - 5x = 22 - 15 +5
4x = 7 + 5
4x = 12
x = 12/4
x = 3

f) 2 . ( 9x - 4 ) - 7 + ( 6 - 5x ) . 3 = 18
18x - 8 - 7 + 18 - 15x = 18
18x - 15x = 18 + 8 + 7 - 18
3x = 33 - 18
3x = 15
x = 15/3
x = 5

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