Question

13. 3.5y=225 14. 224:x+14=70 15. x:83+59=64 y:62+23=32 16. 17. x:35-8=6 18. 49y-343=343

Answer 1

Пошаговое объяснение:

3,5у = 225

у = 225 : 3,5

у = 225 : 35/10

у = 225 * 10/35

у = 45 * 10/7

у = 450/7

у = 64 2/7

224 : х + 14 = 70

224 : х = 70 - 14

224 : х = 56

х = 224 : 56

х = 4

х : 83 + 59 = 64

х : 83 = 64 - 59

х : 83 = 5

х = 5 * 83

х = 415

у : 62 + 23 = 32

у : 62 = 32 - 23

у : 62 = 9

у = 9 * 62

у = 558

х : 35 - 8 = 6

х : 35 = 6 + 8

х : 35 = 14

х = 14 * 35

х = 490

49у - 343 = 343

49у = 343 + 343

49у = 686

у = 686 : 49

у = 14

Answer 2

It seems like you've provided a list of equations. I'll solve each of them for you:

13. 3.5y = 225 To solve for y, divide both sides by 3.5: y = 225 / 3.5 y ≈ 64.29

14. 224 / x + 14 = 70 Subtract 14 from both sides: 224 / x = 70 - 14 224 / x = 56 Now, multiply both sides by x to isolate x: 224 = 56x Divide both sides by 56: x = 224 / 56 x = 4

15. x / 83 + 59 = 64 Subtract 59 from both sides: x / 83 = 64 - 59 x / 83 = 5 Now, multiply both sides by 83 to isolate x: x = 5 * 83 x = 415

Similarly, for y: y / (62 + 23) = 32 y / 85 = 32 Now, multiply both sides by 85 to isolate y: y = 32 * 85 y = 2720

16. x / 35 - 8 = 6 Add 8 to both sides: x / 35 = 6 + 8 x / 35 = 14 Now, multiply both sides by 35 to isolate x: x = 14 * 35 x = 490

17. The equation "x:35-8=6" is essentially the same as equation 16, so the solution is also x = 490.

18. 49y - 343 = 343 Add 343 to both sides: 49y = 343 + 343 49y = 686 Now, divide both sides by 49 to isolate y: y = 686 / 49 y = 14

So, the solutions to the equations are: 13. y ≈ 64.29

14. x = 4
15. x = 415, y = 2720
16. x = 490
17. x = 490
18. y = 14