Calcule x nas proporção a seguir
a) x+7/4 = 11 - x /2
b) x+3/ 12-x = 2/3
c) 18/ 8+x = 2/x
d) 2-2x/3x = 1/3
Determine o valor do termo desconhecido
a) x/3 = 26/6
b) 8/y = 50/25
c) 6/7 = w/21
d)x + 2/4 = 42/14
fazer o calculo por favor.
Soluções para a tarefa
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