Question

Уравнение : 3с:0,5=3 ; 9а:0,9=4 ; 8х-0,5х-5=2,5 ; 3-1/2х=0 ; 1/2а-1/2=1/2 ; 1 1/4х+1=2 1/4 ; 1/4х+1/4х=2

Answer 1

Пошаговое объяснение:

1)3с:0,5=3

3с=3*0,5

3с=1,5

с=0,5

2)9а:0,9=4

9а=4*0,9

9а=3,6

а=0,4

3)8х-0,5х-5=2,5

7,5х=2,5+5

7,5х=7,5

х=7,5/7,5

х=1

4)3-1/2х=0

-1/2х=0-3

-1/2х=-3

1/2х=3

х=3/1/2

х=6

Answer 2

1. 3c : 0.5 = 3 We can simplify this equation by dividing both sides by 0.5: 6c = 3 Now we can solve for c by dividing both sides by 6: c = 0.5

2. 9a : 0.9 = 4 Similarly, we can simplify this equation by dividing both sides by 0.9: 10a = 4 Now we can solve for a by dividing both sides by 10: a = 0.4

3. 8x - 0.5x - 5 = 2.5 First, we can combine like terms on the left side: 7.5x - 5 = 2.5 Then we can add 5 to both sides: 7.5x = 8.5 Finally, we can solve for x by dividing both sides by 7.5: x = 1.1333... (rounded to 4 decimal places)

4. 3 - 1/2x = 0 We can start by isolating the term with x on one side of the equation: -1/2x = -3 Then we can solve for x by dividing both sides by -1/2, which is the same as multiplying both sides by -2: x = 6

5. 1/2a - 1/2 = 1/2 We can simplify this equation by adding 1/2 to both sides: 1/2a = 1 Now we can solve for a by multiplying both sides by 2: a = 2

6. 1 1/4x + 1 = 2 1/4 First, we can subtract 1 from both sides: 1 1/4x = 1 1/4 Then we can convert both sides to improper fractions: 5/4x = 5/4 Now we can solve for x by dividing both sides by 5/4, which is the same as multiplying both sides by 4/5: x = 1

7. 1/4x + 1/4x = 2 We can combine like terms on the left side: 1/2x = 2 Then we can solve for x by multiplying both sides by 2: x = 4

Therefore, the solutions are: c = 0.5 a = 0.4 x = 1.1333... (rounded to 4 decimal places) x = 6 a = 2 x = 1 x = 4