Question

231+х=909:3. 75:х=50:10. 20×а-432=568. х+579=309×3. х-465=76×5​

Answer 1

231 + х = 909 : 3

231 + х = 303

х = 303 - 231

х = 72

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75 : х = 50 : 10

75 : х = 5

х = 75 : 5

х = 15

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20 * а - 432 = 568

20а = 568 + 432

20а = 1000

а = 1000 : 20

а = 50

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х + 579 = 309 * 3

х + 579 = 927

х = 927 - 579

х = 348

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х - 465 = 76 * 5

х - 465 = 380

х = 380 + 465

х = 845

Answer 2

Let's solve the equations step-by-step:

1. 231 + х = 909 ÷ 3 To solve for 'x,' first simplify the right side of the equation: 909 ÷ 3 = 303 Now, the equation becomes: 231 + х = 303 Next, isolate 'x' on one side by subtracting 231 from both sides: х = 303 - 231 х = 72

2. 75 ÷ х = 50 ÷ 10 To solve for 'x,' first simplify both sides of the equation: 75 ÷ х = 5 Now, to get 'x' alone, multiply both sides by 'x': x * (75 ÷ x) = x * 5 75 = 5x Next, isolate 'x' on one side by dividing both sides by 5: x = 75 ÷ 5 x = 15

3. 20 × а - 432 = 568 To solve for 'a,' first isolate 'a' on one side by adding 432 to both sides: 20 × а = 568 + 432 20 × а = 1000 Now, to get 'a' alone, divide both sides by 20: а = 1000 ÷ 20 а = 50

4. х + 579 = 309 × 3 To solve for 'x,' first simplify the right side of the equation: 309 × 3 = 927 Now, the equation becomes: x + 579 = 927 Next, isolate 'x' on one side by subtracting 579 from both sides: x = 927 - 579 x = 348

5. х - 465 = 76 × 5 To solve for 'x,' first simplify the right side of the equation: 76 × 5 = 380 Now, the equation becomes: x - 465 = 380 Next, isolate 'x' on one side by adding 465 to both sides: x = 380 + 465 x = 845

So, the solutions to the given equations are: x = 72, x = 15, a = 50, x = 348, and x = 845.