Question

1)3(х-2)=10х 2)2(0,2х-3)-8(0,7х-4)=39 3)х-2/x-3=7*5 напишіть рівняння з поясненнями та поступово даю 20 балів

Answer 1

Ответ:

Пошаговое объяснение:

1)3(х-2)=10х

3х-6=10х

3х-10х=6

-7х=6

х=-6/7

2)2(0,2х-3)-8(0,7х-4)=39

0.4х-6-5.6х+32=39

0.4х-5.6х=39-32+6

-5.2х=13

х=13:(-5.2)

х=-2.5

3)х-2/x-3=7*5

х-2/x-3=35

(х-3)*35=х-2

35х-105=х-2

35х-х=105-2

34х=103

х=103/34=3 1/34

34х=103

Answer 2

1. 3(x-2) = 10x

To solve for x, we need to simplify the equation by distributing the 3 on the left side:

3x - 6 = 10x

Next, we can isolate the variable terms on one side of the equation and the constant terms on the other side by subtracting 3x from both sides:

-6 = 7x

Finally, we can solve for x by dividing both sides by 7:

x = -6/7

Therefore, the solution to the equation 3(x-2) = 10x is x = -6/7.

2. 2(0.2x-3) - 8(0.7x-4) = 39

To solve for x, we first need to simplify the left side of the equation by distributing the coefficients:

0.4x - 6 - 5.6x + 32 = 39

Next, we can combine like terms on the left side:

-5.2x + 26 = 39

Then, we can isolate the variable term on one side by subtracting 26 from both sides:

-5.2x = 13

Finally, we can solve for x by dividing both sides by -5.2:

x = -2.5

Therefore, the solution to the equation 2(0.2x-3) - 8(0.7x-4) = 39 is x = -2.5.

3. x-2/x-3 = 7*5

To solve for x, we first need to simplify the right side of the equation:

x-2/x-3 = 35

Next, we can eliminate the fraction by multiplying both sides by the denominator of the left side:

x-2 = 35(x-3)

Then, we can distribute the 35 on the right side:

x-2 = 35x - 105

Next, we can isolate the variable term on one side by subtracting x from both sides:

-2 = 34x - 105

Finally, we can solve for x by adding 105 to both sides and dividing by 34:

x = 103/34

Therefore, the solution to the equation x-2/x-3 = 7*5 is x = 103/34.