Question

calcule o valor x onde os ângulos A, B e C são ângulos do triângulo ABC​

Answer 1

a)

$2x-10+x+10+2x=180 \\ 5x=180 \\ x=\frac{180}{5}\\x=36$

b)

$3x+2x+x=180 \\ 6x=180 \\ x=\frac{180}{6} \\ x=30$

c)

$x+2x+x+20=180 \\4x=180-20 \\4x=160$

$x=\frac{160}{4} \\x=40$

d)

$x+x+30+x+15=180 \\3x=180-45 \\ x=\frac{135}{3}$

$x=45$

e)

$2x+x-30+x+10=180 \\4x=180+20 \\ 4x=200$

$x=\frac{200}{4} \\ x=50$

f)

$x+x+30+3x=180 \\5x=180-30 \\ 5x=150$

$x=\frac{150}{5}\\x=30$