Question

1) (12-х)*6,5=23,4. 2) (у-3,3):5,3=0,07. 3) 153+0,625у=215,5. 4) 0,32х+0,47=12,8.​

Answer 1

Ответ:

Пошаговое объяснение:

1) (12-х)*6,5=23,4.

12 - x = 23,4 : 6,5

12 - x = 3,6

x = 12 - 3,6

x = 8.4

2) (у-3,3):5,3=0,07.

y - 3,3 = 0,07 * 5,3

y - 3,3 = 0,371

y = 0,371 + 3,3

y = 3,671

3) 153+0,625у=215,5.

0,625y = 215,5 - 153

0,625y = 62,5

y = 62,5 : 0,625

y = 100

4) 0,32х+0,47=12,8.​

0,32x = 12,8 - 0,47

0,32x = 12,33

x = 12,33 : 0,32

x = 38,53125

Answer 2

1) (12-х)×6,5 = 23,4

12-х = 23,4/6,5

12-х = 3,6

х = 12-3,6

х = 8,4

2) (у-3,3)÷5,3 = 0,07

у-3,3 = 0,07×5,3

у-3,3 = 0,371

у = 3,3+0,371

у = 3,671

3) 153+0,625у = 215,5

0,625у = 215,5-153

0,625у = 62,5

у = 62,5÷0,625

у = 100

4) 0,32х+0,47=12,8

0,32х = 12,8-0,47

0,32х = 12,33

х = 12,33÷0,32

х = 38,53(125)

Answer 3

To solve each equation, follow these steps:

1. (12-х) * 6.5 = 23.4

Step 1: Distribute the 6.5 on the left side of the equation: 6.5 * 12 - 6.5 * х = 23.4

Step 2: Simplify the equation: 78 - 6.5х = 23.4

Step 3: Move the constants to the right side of the equation: -6.5х = 23.4 - 78 -6.5х = -54.6

Step 4: Solve for х by dividing both sides by -6.5: х = -54.6 / -6.5 х ≈ 8.4

So, the solution for х is approximately 8.4.

2. (у-3.3) / 5.3 = 0.07

Step 1: Multiply both sides by 5.3 to eliminate the fraction: 5.3 * (у - 3.3) = 0.07 * 5.3

Step 2: Simplify the equation: у - 3.3 = 0.371

Step 3: Move the constant to the right side of the equation: у = 0.371 + 3.3 у ≈ 3.671

So, the solution for у is approximately 3.671.

3. 153 + 0.625у = 215.5

Step 1: Subtract 153 from both sides to isolate the variable: 0.625у = 215.5 - 153 0.625у = 62.5

Step 2: Solve for у by dividing both sides by 0.625: у = 62.5 / 0.625 у = 100

So, the solution for у is 100.

4. 0.32х + 0.47 = 12.8

Step 1: Subtract 0.47 from both sides to isolate the variable: 0.32х = 12.8 - 0.47 0.32х = 12.33

Step 2: Solve for х by dividing both sides by 0.32: х = 12.33 / 0.32 х ≈ 38.53125

So, the solution for х is approximately 38.53125.