Question

1)Resolva as seguintes equações

a)3X+2.(X-1)=10

b)3X+2.(2+X)=12

c)15.(X+1)=25

d)X.(3+2)=25

e)X.(3+2)=100

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Answer 1

Resposta:

a)3x+2(x-1)=10

3x+2x-2=10

3x+2x=10+2

5x=12

x=12/5

b)3x+2(2+x)=12

3x+4+2x=12

3x+2x=12-4

5x=8

x=8/5

c)15(x+1)=25

15x+15=25

15x=25-15

15x=10

x=10/15

x=2/3

d)x(3+2)=25

3x+2x=25

5x=25

x=25/5

x=5

e)x(3+2)=100

3x+2x=100

5x=100

x=100/5

x=20