Question

me ajudem pfvr.......











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Answer 1

Resposta:

Explicação passo a passo:

q.

2.(3x-1)+2.(3-x)=0

6x-2+6-2x=0

4x+4=0

4x=0-4

4x=-4

x=-4/4

x=-1

r.

7.(x-1)=2.(3x+1)

7x-7=6x+2

7x-6x=2+7

x=9

s.

2.(3-y) + 7.(2-y)=15-4y

6-2y+14-7y=15-4y

-9y+20=15-4y

-9y+4y=15-20

-5y=-5 (-1)

5y=5

y=5/5

y=1

t.

2(x-2)+5.(2-x)+6.(x+1)=0

2x-4+10-5x+6x+6=0

3x+12=0

3x=0-12

3x=-12

x=-12/3

x=-4

u.

3.(x-2)-(1-x)=13

3x-6-1+x=13

4x-7=13

4x=13+7

4x=20

x=20/4

x=5

v.

x-(x+1)=12-(3x-2)

x-x-1=12-3x+2

x-x+3x=12+2+1

3x=15

x=15/3

x=5