Question

Rozwiaz ponizsze rownania : 2,4+ a=7,1

y-18=-52

-1/3b=-7

2x+1=7-x

18-7y=-2y - 57

1/5(5x-1)=4

4*(5+2x)=6(2x-4)

5(-2-2/5)+7=25-6x

z góry dzieki

Answer 1

 2,4+ a=7,1

a = 7,1 - 2,4

a = 4,7

 

y-18=-52

y = -52 + 18

y= -34

 

-1/3b=-7  /*(-3)

b=21

 

2x+1=7-x

2x + x = 7 - 1

3x = 6  /:3

x= 2

 

18-7y=-2y - 57

-7y + 2y = -57 - 18

-5y = -75   /:(-5)

y  = 15

 

1/5(5x-1)=4

5x - 1/5 = 4

5x = 4-1/5

5x = 3 4/5

5x = 19/5   /*(1/5)

x = 19/5 * 1/5

x = 19/25

 

4*(5+2x)=6(2x-4)

20 + 8x = 12x - 24

20 + 24 = 12x -8x

44 = 4x   /:4

x = 11

 

5(-2-2/5)+7=25-6x

-10 - 2 + 7 = 25 - 6x -30 = -6x   /:(-6) x = 5