Question

1-Resolva as equações

a x+x+x=78

b 2x+3x+4=189

c 2x+3x+4x=189

d 5x- 4 -3x= -16

e 5x+x-4/7= -4

f 8x-9-x/5= -1

Answer 1

A ) 3X = 78
X = 78 \3 
X = 26

B) 5X = 189 -4
5X = 185
X = 185\5
X= 37

C) 9X = 189
X= 189\9
X = 21

D) 2X = -16 +4 
2X = -12 
X = -12 \ 2 
X = -6

E) 6X = -4 + 4\7 ( TIRA O MINIMO = 7 )
42 X = -28 + 4
42 X = -24
X = -24\42
X = - 12\21  >>> X = - 4 \ 7

F) PRIMEIRO TIRA O MINIMO = 5
40X - 45 - X = -5
39X = -5 + 45
39X = 40
X = 40\39