Question

X:20=300 30:x-3=1215×(30-x)=4516:y=25×y-8=1230×(9-y) =15015×y=45y:10+1=209×(15-y) =72x:13=2605×x+18=38100:(10-y) =2015×x=6018:x-5=4(x-30)×5=40y:25=86×y+4=2820:(y-3)=2 HelpSosПомогите

Answer 1

X:20=300
х=300*20
х=6000

Answer 2

It seems like you have a series of equations to solve for different variables. Let's go through each equation one by one and find the values of the variables.

1. X:20 = 300 To solve for X, we can multiply both sides by 20: X = 300 * 20 X = 6000

2. 30:x-3 = 1215 To solve for x, first, add 3 to both sides: 30/x = 1215 + 3 30/x = 1218 Now, multiply both sides by x: 30 = 1218x Divide both sides by 1218: x = 30 / 1218 x ≈ 0.0246

3. (30-x) * (30-x) = 4516 This equation is quadratic in nature. We can expand it and solve for x: 900 - 60x + x^2 = 4516 Rearrange to the standard quadratic form: x^2 - 60x + 900 - 4516 = 0 x^2 - 60x - 3616 = 0

Solving this quadratic equation gives two solutions: x ≈ 70.55 or x ≈ -10.55

4. y = 25 The value of y is given as 25.

5. y-8 = 1230 * (9-y) Let's solve for y: y - 8 = 1230 * (9 - y) y - 8 = 11070 - 1230y Add 1230y to both sides: 1231y - 8 = 11070 Now, add 8 to both sides: 1231y = 11078 Finally, divide both sides by 1231: y ≈ 9

6. 15 * y = 45 * y / (10 + 1) = 4 Let's solve for y: 15 * y = 45 * y / 11 Multiply both sides by 11 to eliminate the denominator: 165 * y = 45 * y Subtract 45y from both sides: 165y - 45y = 0 Combine like terms: 120y = 0 Finally, divide both sides by 120: y = 0

7. 9 * x = 60 Let's solve for x: 9 * x = 60 Divide both sides by 9: x = 60 / 9 x ≈ 6.67

8. x-5 = 4(x-30) Let's solve for x: x - 5 = 4(x - 30) Distribute the 4 on the right side: x - 5 = 4x - 120 Subtract x from both sides: -5 = 3x - 120 Add 120 to both sides: 115 = 3x Finally, divide both sides by 3: x ≈ 38.33

9. 5 * y / 25 = 86 Let's solve for y: 5 * y / 25 = 86 Multiply both sides by 25 to eliminate the denominator: 5 * y = 2150 Finally, divide both sides by 5: y = 430

10. 20 / (y - 3) = 2 Let's solve for y: 20 / (y - 3) = 2 Multiply both sides by y - 3 to eliminate the denominator: 20 = 2(y - 3) Divide both sides by 2: 10 = y - 3 Add 3 to both sides: y = 13

So, the solutions to the given equations are:

X = 6000 x ≈ 0.0246 or x ≈ 70.55 or x ≈ -10.55 y = 25 y ≈ 9 or y = 0 or y = 430 or y = 13 x ≈ 6.67 or x ≈ 38.33

Please note that there are multiple solutions for some of the equations, so make sure to double-check the calculations and context of the problem if needed.