Question

2) Resolva as equações abaixo:

a) 2x + 21 = -7

b) 3x - 15 = 12

c) 5x + 45 =-15

d) 6x + 26=50

e) 4x - 54 =-14

f) 4x=-48

9) 3x = -36

h) 5x = 30

i)= -6

j) = -8

3 - Calcule o valor das expressões:

a) - [-(-8)]

b) -[-(-6+ 9)]

e) - 10 +7+[-(-9)]

d) (-5) + [-(-4)]

e) -[-(2+ 4)]

f)- [10+(-8)]

g)0-4 -8 +3

h) -[-2-1- 3.]

i)-3-[-(-4+ 5)]

j) - [(-1+3) -4]

k) - [-2-7-1)

i)-[-3-8- (5+ 4)]

m) (10 - 2) -3 + (8+7-5)​

Answer 1

Resposta:

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