Question

05- Resolva as questões abaixo

a)×-3=9


b)4× -9= 1-2×


c)×+5=20-4×

d)×+5=20-4×

e)9×- 4× +10= 7×- 30


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Answer 1

Resposta:

a)×-3=9

x=9+3

x=12

b)4× -9= 1-2×

4x+2x=1+9

6x=10

x=$\frac{10}{6}$               x≅1,66...

c)×+5=20-4×

x+4x=20-5

5x=15

x=$\frac{15}{5}$

x=3

d)×+5=20-4×

x+4x=20-5

5x=15

x=$\frac{15}{5}$

x=3

e)9×- 4× +10= 7×- 30

9x+10=4x+7x-30

9x+10=11x-30

11x-9x=10+30

2x=40

x=$\frac{40}{2}$

x=20