Question

Calcule utilizando a regra dos sinais
a)(-52)+(-29) + (+15)+(+10)=
b)(+68)+(-59) + (+45)+(-20)=
c)(-36)+(-45) + (+28)+(+91)=
d)(+74)+(-87) + (+64)+(-22)=
e) –28-12 -78 +87=
f)+220 -534=
g) -24-25 +29 -21=
h) – 47+15 -15 +32=

2) Calcule as equações de 1º Grau
a) x + 2x + 3 – 5x = 4x – 9
b) 17x – 7x = x + 18
c) 5x + 6x – 16 = 3x + 2x – 4
d) x + x – 4 = 17 – 2x + 1
e) f) 5x + 4 = 3x – 2x + 4

Answer 1

Resposta

a) –56

b) 36

c) 38

d) 29

e) –31

f) –314

g) –41

h) – 15

2) a) x = 2

b) x = 2

c) x =2

d) x = 11/2

e) x = 0

Espero ter ajudado