Question

Calcule o valor de X e Y observando as figuras abaixo:

Answer 1

a) 
Y = 120
180-60 = 120

X= 25
3x-15+120=180
3x-15=180-120
3x-15=60
3x=60+15
3x=75
X=75/3
X=25

b) 
5x-15=4x+15
5x-4x=15+15
x=30

y+4x+15=180
y+4.30+15=180
y+120+15=180
y+135=180
y=180-135
y=45