Question

calcule o valor das incógnitas

Answer 1

a)
y+65=180
y=180-65
y=115

z+y=180
z=180-115
z=65

x+y+z+65=360
x+115+65=360
x+180=360
x=360-180
x=180

b)3x+30=1x+10
4x=10-30
4x=-20
20/4=x
x=5

z+3•5+30=180
z+15+30=180
z+45=180
z=180-45
z=135



y+5+10=180
y=180-15
y=165