Question

(x – 5) • 12 = 144;(y + 3) • 9 = 81 ; (x • 4 – 5) • 15 = 165; (y • 2 + 3) • 7 = 49 ;(x – 8) • 13 = 169; (y + 5) • 7 = 49; (x • 7 – 12) • 9 = 81; (y • 5 + 4) • 14 = 196.

Answer 1

Я могу решить всего пару уравнений, ибо сейчас тороплюсь, прости..
(х-5) • 12 = 144
х= 144 : 12
х= 12 + 5
х= 17


(y+3) • 9 = 81
y= 81 : 9
y= 9 - 3
y = 6

(x • 4 - 5) • 15= 165
x= 165 : 15
x= 11 + 5
x= 16 : 4
x = 4

Answer 2

Ответ: 1) х=17. 2) х=6. 3) х=4. 4) у=5. 5) х=21. 6) у=2. 7) х=3. 8) у=2

Answer 3

Let's solve each equation step by step:

1. (x - 5) * 12 = 144

First, distribute 12 to the terms inside the parentheses: 12x - 60 = 144

Next, isolate the variable by adding 60 to both sides: 12x = 204

Finally, divide both sides by 12 to solve for x: x = 17

2. (y + 3) * 9 = 81

Following the same steps as before: 9y + 27 = 81 9y = 81 - 27 9y = 54 y = 6

3. (x * 4 - 5) * 15 = 165

Expand and simplify: (4x - 5) * 15 = 165 60x - 75 = 165 60x = 165 + 75 60x = 240 x = 4

4. (y * 2 + 3) * 7 = 49

Solving step by step: (2y + 3) * 7 = 49 14y + 21 = 49 14y = 49 - 21 14y = 28 y = 2

5. (x - 8) * 13 = 169

Expanding and simplifying: 13x - 104 = 169 13x = 169 + 104 13x = 273 x = 21

6. (y + 5) * 7 = 49

Following the same steps: 7y + 35 = 49 7y = 49 - 35 7y = 14 y = 2

7. (x * 7 - 12) * 9 = 81

Expanding and simplifying: (7x - 12) * 9 = 81 63x - 108 = 81 63x = 81 + 108 63x = 189 x = 3

8. (y * 5 + 4) * 14 = 196

Solving step by step: (5y + 4) * 14 = 196 70y + 56 = 196 70y = 196 - 56 70y = 140 y = 2

So, the solutions to the given equations are: x = 17, y = 6 x = 4, y = 2 x = 21, y = 2 x = 3, y = 2