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
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
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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