Resposta:
a)
+
7
4
=
1
1
+
−
2
x+\frac{7}{4}=11+\frac{-x}{2}
x+47=11+2−x
+
7
4
=
2
⋅
1
1
2
+
−
2
=
3
7
/6
b)
+
3
1
2
−
=
2
3
x+{\color{#c92786}{\frac{3}{12}}}-x=\frac{2}{3}
x+123−x=32x
+
1
4
−
=
2
3
1
/4
=
2
/3
c) 1
8
8
+
=
2
{\color{#c92786}{\frac{18}{8}}}+x=\frac{2}{x}
818+x=x2
9
4
+
=
2
=
−
9
±
2
0
9
√
8
d) 2 - 2x
______= - 1/3
3x
3x .(-1)= 3.(2-2x)
-3x = 6 -6x
6x -3x = 6
3x = 6
x= 6/3
x=2
A)
3
=
2
6
6
\frac{x}{3}={\color{#c92786}{\frac{26}{6}}}
3x=626
3
=
1
3
3
=
1
3
B) 8
=
5
0
2
5
\frac{8}{y}={\color{#c92786}{\frac{50}{25}}}
y8=2550
8
=
2
=
4
C) 6
7
=
2
1
\frac{6}{7}=\frac{w}{21}
76=21w
2
1
⋅
6
7
=
2
1
⋅
2
1
=
1
8
D)
+
2
4
=
4
2
14
x+{\color{#c92786}{\frac{2}{4}}}=\frac{42}{14}
x+42=14/42
+
1
2
=
4
2/
1
4
=
5
2
