Question

85 – 17x = 34; 23(15 – y) = 92; (a + 45) : 11 = 12; 144 : (71 – b) = 9.

Answer 1

Ответ:а)

85-17х=34

-17х=34-85

-17х=-51

х=3

б)

23(15-у)=92

15-у=4

-у=4-15

-у=-11

у=1

с)

(а+45):11=12

а+45=132

а=132-45

а=87

д)

144:(71-b)=9

144:(71-b)=9 b≠71

144=9(71-b)

16=71-b

b=71-16

b=55, b≠71

b=55

Пошаговое объяснение:хз

Answer 2

Let's solve each equation step by step:

1. 85 - 17x = 34: To isolate the variable x, we need to move the constant term (34) to the other side of the equation by subtracting it from both sides: 85 - 34 - 17x = 34 - 34 51 - 17x = 0

   Next, we divide both sides of the equation by -17 to solve for x: (51 - 17x) / -17 = 0 / -17 -3 - x = 0

   To isolate x, we move -3 to the other side by adding it to both sides: -3 + 3 - x = 0 + 3 -x = 3

   Finally, multiplying both sides by -1 gives us the solution for x: (-1)(-x) = (-1)(3) x = -3

   Therefore, the solution for the equation is x = -3.

2. 23(15 - y) = 92: Start by simplifying the equation within the parentheses: 23 * 15 - 23y = 92 345 - 23y = 92

   Next, isolate the term with y by subtracting 345 from both sides: 345 - 345 - 23y = 92 - 345 -23y = -253

   To solve for y, divide both sides of the equation by -23: (-23y) / -23 = (-253) / -23 y = 11

   Therefore, the solution for the equation is y = 11.

3. (a + 45) : 11 = 12: Start by multiplying both sides of the equation by 11 to eliminate the division: 11 * (a + 45) : 11 = 12 * 11 a + 45 = 132

   Next, isolate the variable a by subtracting 45 from both sides: a + 45 - 45 = 132 - 45 a = 87

   Therefore, the solution for the equation is a = 87.

4. 144 : (71 - b) = 9: Start by multiplying both sides of the equation by (71 - b) to eliminate the division: 144 : (71 - b) * (71 - b) = 9 * (71 - b) 144 = 9 * (71 - b)

   Next, divide both sides of the equation by 9 to solve for (71 - b): 144 / 9 = (9 * (71 - b)) / 9 16 = 71 - b

   To isolate b, subtract 71 from both sides: 16 - 71 = 71 - b - 71 -55 = -b

   Finally, multiplying both sides by -1 gives us the solution for b: (-1)(-55) = (-1)(-b) 55 = b

   Therefore, the solution for the equation is b = 55.

In summary, the solutions for the given equations are: x = -3, y = 11, a = 87, b = 55.