Question

Calcule a medida x nos seguintes casos:
a)
b)
c)
d)​

Answer 1

a)

$35+x=90\\x=90-35$

$x=55$º

b)

$x+140=180\\x=180-140$

$x=40$º

c)

$\frac{x}{2}+140=180 \\\frac{x}{2}=180-140\\\frac{x}{2}=40$

$x=80$

d)

$3x+2x=90\\5x=90\\x=\frac{90}{5}$

$x=18$