Resolva as equações do 1o Grau:
a) × + 5= 8? l)2× + 4= 16?
b) × - 4= 3? m)3× =15?
c)× + 6= 5? n)2× = 10?
d)× - 7= -7? o)3× = -9?
e)× + 9= -1? p)2× - 2= 12 - 5×?
f)× - 39= -79? q)3× - 13 = 8?
g)10 = × + 8? r) 4× - 9 = 23?
h)15= × + 20? s)7× - 33= - 12?
i)4= × - 10? t)33+ × =5 - 3×?
j)7= × + 8? u)2× = 14?
k)× - 1= 5? v)7× = -21?
Soluções para a tarefa
Resposta:
A) × + 5= 8? L )2× + 4= 16?
X = 8 - 5 2X =16 - 4
X = 3 2X = 12
X = 12 ÷2
X = 6
B) × - 4= 3? M)3× =15?
X = 3 + 4 X= 15 ÷ 3
X = 7 X= 5
C)× + 6= 5? N)2× = 10?
X= 5 - 6 X = 10 ÷ 2
X = - 1 X = 5
D)× - 7= -7? O)3× = -9?
X = - 7 + 7 X = - 9 ÷ 3
X = 0 X = - 3
E)× + 9= -1? P)2× - 2= 12 - 5×?
X = -1 - 9 2X + 5X = 12 +2
X= - 10 7X = 14
X = 14÷7
X= 7
F)× - 39= -79? Q)3× - 13 = 8?
X = -79 + 39 3X = 8 + 13
X = - 40 3X = 21
X = 21 ÷3
X= 7
G)10 = × + 8? R) 4× - 9 = 23?
X = 8 - 10 4X = 23 + 9
X = - 2 4X = 32
X = 32 ÷ 4
X = 8
H)15= × + 20? S)7× - 33= - 12?
X = 20 - 15 7X = - 12 + 33
X = 5 7X = 21
X = 21÷7
X = 3
I)4= × - 10? T)33+ × =5 - 3×?
X = -10 - 4 X + 3X= 5 - 33
X= - 14 4X = 28
X = 28 ÷ 4
X = 7
J)7= × + 8? U)2× = 14?
X = 8 - 7 X = 14 ÷ 2
X = 1 X = 7
K)× - 1= 5? V)7× = -21?
X = 5 + 1 X = -21 ÷ 7
X = 6 X = - 3
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