Question

Calcule o valor das incógnitas nos seguintes feixes de retas paralelas:​

Answer 1

Explicação passo-a-passo:

A)

\begin{lgathered}138 + 4x-34 = 180\\ 4x =180-104\\ x=\frac{76}{4}\\ x=19°\end{lgathered}

138+4x−34=180

4x=180−104

x=

4

76

x=19°

B)

\begin{lgathered}107=3a-10\\ 3a=117\\ a=\frac{117}{3}\\ a= 39°\end{lgathered}

107=3a−10

3a=117

a=

3

117

a=39°

C)

\begin{lgathered}2x+28-45\\ 2x=17\\ x=8,5\end{lgathered}

2x+28−45

2x=17

x=8,5

D)

\begin{lgathered}n+126=180\\ n=54\\ z=n\\ z=54\\\\ 54+y+y-30=180\\ 2y=156\\ y=78\\\\ x+36=y-30\\ x+36=78-30\\ x=48-36\\ x=12\end{lgathered}

n+126=180

n=54

z=n

z=54

54+y+y−30=180

2y=156

y=78

x+36=y−30

x+36=78−30

x=48−36

x=12

E)

\begin{lgathered}z+144=180\\ z=36\\\\ 36+y+2y=180\\ 3y=144\\ y=48\\\\ 2y=x+36\\ 96=x+36\\ x=60\end{lgathered}

z+144=180

z=36

36+y+2y=180

3y=144

y=48

2y=x+36

96=x+36

x=60