Question

10(х-9)=7 4(х-8)=-5 5(х+9)=-9 5(х+9)=-8 4(х-2)=-1 9(х-6)=4х 3(х+5)=2х 10(х+4)=9х 4(х-7)=3х 5(х-7)=9х

Answer 1

Відповідь:1)9,7

2)6,75

3)-10,8

4)-10,6

5)1,75

6)10,8

7)-15

8)-40

9)12,25

10)-8,75

Покрокове пояснення:10(х-9)=7

10х-90=7

10х=7+90

10х=97

х=97÷10

х=9,7

Answer 2

Let's solve each of these equations one by one:

1. 10(x - 9) = 7 Start by distributing the 10 on the left side: 10x - 90 = 7

   Add 90 to both sides to isolate the variable x: 10x = 7 + 90 10x = 97

   Divide both sides by 10 to solve for x: x = 97 / 10 x = 9.7

2. 4(x - 8) = -5 Start by distributing the 4 on the left side: 4x - 32 = -5

   Add 32 to both sides to isolate the variable x: 4x = -5 + 32 4x = 27

   Divide both sides by 4 to solve for x: x = 27 / 4 x = 6.75

3. 5(x + 9) = -9 Start by distributing the 5 on the left side: 5x + 45 = -9

   Subtract 45 from both sides to isolate the variable x: 5x = -9 - 45 5x = -54

   Divide both sides by 5 to solve for x: x = -54 / 5 x = -10.8

4. 5(x + 9) = -8 Start by distributing the 5 on the left side: 5x + 45 = -8

   Subtract 45 from both sides to isolate the variable x: 5x = -8 - 45 5x = -53

   Divide both sides by 5 to solve for x: x = -53 / 5 x = -10.6

5. 4(x - 2) = -1 Start by distributing the 4 on the left side: 4x - 8 = -1

   Add 8 to both sides to isolate the variable x: 4x = -1 + 8 4x = 7

   Divide both sides by 4 to solve for x: x = 7 / 4 x = 1.75

6. 9(x - 6) = 4x Start by distributing the 9 on the left side: 9x - 54 = 4x

   Subtract 4x from both sides to isolate the variable x: 9x - 4x = 54 5x = 54

   Divide both sides by 5 to solve for x: x = 54 / 5 x = 10.8

7. 3(x + 5) = 2x Start by distributing the 3 on the left side: 3x + 15 = 2x

   Subtract 2x from both sides to isolate the variable x: 3x - 2x = 15 x = 15

8. 10(x + 4) = 9x Start by distributing the 10 on the left side: 10x + 40 = 9x

   Subtract 9x from both sides to isolate the variable x: 10x - 9x = 40 x = 40

9. 4(x - 7) = 3x Start by distributing the 4 on the left side: 4x - 28 = 3x

   Subtract 3x from both sides to isolate the variable x: 4x - 3x = 28 x = 28

10. 5(x - 7) = 9x Start by distributing the 5 on the left side: 5x - 35 = 9x

    Subtract 9x from both sides to isolate the variable x: 5x - 9x = 35 -4x = 35

    Divide both sides by -4 to solve for x: x = -35 / -4 x = 8.75

So, the solutions for each equation are as follows:

1. x = 9.7
2. x = 6.75
3. x = -10.8
4. x = -10.6
5. x = 1.75
6. x = 10.8
7. x = 15
8. x = 40
9. x = 28
10. x = 8.75