Question

4- Determine o valor numérico das expressões algébricas, sendo
X = 6 , Y= 2 z= -1:
a) x - y =
b) x-z=
c) 2x + y =
d) 3y + 2x =
e) 2x + 3y - 2=
f) 10x + 5y - 2x=
g) X.y=
h) 5z + 8y =
i) 2y +2x - 2=
j) 4x-2y =
k) 7x - 4x =
1) 2z + 6z =
m) 4y +52
n) 6x - x =
o) 9x - 4y +2x =
p) 6z +x
q) 10y +5x +4y =
r) X+y+z=​

Answer 1

Explicação passo-a-passo:

a) x - y = 6-2=4

b) x-z= 6-(-1)=7

c) 2x + y = 2×6+2=12+2=14

d) 3y + 2x =3×2+2×6=6+12=18

e) 2x + 3y - 2= 2×6+3×2-2=12+6-2=16

f) 10x + 5y - 2x= 10×6+5×2-2×6=60+10-12=58

g) X.y= 6×2=12

h) 5z + 8y =5(-1)+8×2=-5+16=9

i) 2y +2x - 2= 2×2+2×6-2=4+12-2=14

j) 4x-2y = 4×6-2×2=24-4=20

k) 7x - 4x =7×6-4×6=42-24=18

1) 2z + 6z = 2(-1)+6(-1)=-2+(-6)=-8

m) 4y +52 =4(-1)+52=-4+52=48

n) 6x - x =6×6-6=36-6=30

o) 9x - 4y +2x =9×6-4×2+2×6= 54-8+12=58

p) 6z +x 6(-1)+6=-6+6=0

q) 10y +5x +4y = 10×2+5×6+4×2=20+30+8=58

r) X+y+z= 6+2-1=7