Question

1,6x−2,5=4,1x -2x−20=7x+43 −16−1,5x=43,8+3,1x 0,9+7+(-6,53k)=12+0,9−6,73k 7⋅(7+y)−4y=4y−67

Answer 1

1). 1,6x - 2,5 = 4,1x                 2). -2x - 20 = 7x + 43       

   4,1x - 1,6x = -2,5                     7x + 2x = -20 - 43           

   2,5x = -2,5                              9x = -63                            

   x = -1                                         x = -7                            

3). -16 -1,5x = 43,8 + 3,1x        5). 7·(7 + y) - 4y = 4y - 67

    3,1x + 1,5x = -16 - 43,8            7y - 4y - 4y = -67 - 49  

    4,6x = -59,8                              -y = -116

       x = -13                                      y = 116    

4). 0,9 + 7 + (-6,53k) = 12 + 0,9 - 6,73k

    6,73k - 6,53k = 12,9 - 7,9

    0,2k = 5

    k = 25                                         

Answer 2

1,6x−2,5=4,1x

1.6х-4.1х=2.5

-2.5х=2.5

х=-1

-2x−20=7x+43

-2х-7х=43+20

-9х=63

х=-7

−16−1,5x=43,8+3,1x

-1.5х-3.1х=43.8+16

-4.6х=59.8

х=-13

0,9+7+(-6,53k)=12+0,9−6,73k

0.9+7-6.53k=12+0.9-6.73k

-6.53k+6.73k=12+0.9-0.9-7

0.2x=5

x=25

7⋅(7+y)−4y=4y−67

49+7у-4у=4у-67

7у-4у-4у=-67-49

-у=-116

у=116

Answer 3

1. 1.6x - 2.5 = 4.1x To solve for x, we need to isolate x on one side of the equation. We can do that by first subtracting 1.6x from both sides, then adding 2.5 to both sides:

1.6x - 1.6x - 2.5 = 4.1x - 1.6x -2.5 = 2.5x

Now, we can solve for x by dividing both sides by 2.5:

x = -1

2. -2x - 20 = 7x + 43 To solve for x, we can start by isolating the x terms on one side and the constant terms on the other. We can do that by first adding 2x to both sides, then subtracting 43 from both sides:

-2x - 2x - 20 = 7x + 2x + 43 - 43 -4x - 20 = 9x -20 = 13x

Now, we can solve for x by dividing both sides by 13:

x = -20/13

3. -16 - 1.5x = 43.8 + 3.1x We can start by simplifying both sides of the equation:

-16 - 1.5x = 43.8 + 3.1x -16 - 43.8 = 3.1x + 1.5x -59.8 = 4.6x

Now, we can solve for x by dividing both sides by 4.6:

x = -13

4. 0.9 + 7 + (-6.53k) = 12 + 0.9 - 6.73k We can start by simplifying both sides of the equation:

7 - 6.53k = 12 - 6.73k -6.53k + 6.73k = 12 - 7 0.2k = 5

Now, we can solve for k by dividing both sides by 0.2:

k = 25

5. 7(7+y) - 4y = 4y - 67 We can start by simplifying both sides of the equation:

49 + 7y - 4y = 4y - 67 49 + 3y = 0

Now, we can solve for y by subtracting 49 from both sides and then dividing by 3:

y = -49/3