Question

6)Resolva as equações


-7m+3=-4

2a+5.(a-1)=6

3x/2+1=4

7.(2x-4)=30

40=35-4.(x+6)

75-3.(a+25)=0

4.(a-3)-3.(4+a)=0
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Answer 1

Explicação passo-a-passo:

-7m+3=-4

-7m=-4-3

-7m=-7

m=-7/-7

m=1

2a+5.(a-1)=6

2a+5a-5=6

7a-5=6

7a=6+5

7a=11

a=11/7

3x/2+1=4

3x/2=4-1

3x/2=3

3x=2.(3)

x=2.(3/3)

x=2.(1)

x=2

7.(2x-4)=30

14x-28=30

14x=30+28

14x=58

x=58/14

Simplificando :

x=19/7

40=35-4.(x+6)

40=35-4x-24

40=-4x-24+35

40=-4x+11

4x=11-40

4x=-29

x=-29/4

75-3.(a+25)=0

75-3a-75=0

-3a-75+75=0

-3a+0=0

-3a=0

a=0/-3

a=0

4.(a-3)-3.(4+a)=0

4a-12-12-3a=0

4a-3a-24=0

a-24=0

a=24

Espero ter ajudado!