Question

499. Розв'яжіть рівняння: 1) 14 x + 4x - 48 = 240;2) 250 - 75 - 9 = 279;3) 16a - 7a + 96 = 222;4) 20y + 5y + y + 19 = 227.​

Answer 1

Ответ:

1) 14x - 4x - 48 = 240

14x - 4x = 240+48

10x = 288

x = 28.8

2) 25b - 7b - 9 = 279

25b - 7b = 279 + 9

18b = 288

b = 16

3) 16a - 7a + 96 = 222

16a - 7a = 222 - 96

9a = 126

a =14

4) 20y + 5y + y + 19 = 227

20y + 5y + y = 227 - 19

26y = 208

y = 8

Пошаговое объяснение:

Answer 2

1.
14х+4х-48=240
14х+4х=240+48
18х=288
Х=16



2.
250-75-9=279
166=279
Это равенство ложное




3.
16а -7а+96=222
16а-7а =222-96
9а =126
А=14


4
20у+5у+у+19=227
26у=227-19
26у=208
У=8

Answer 3

1. 14x + 4x - 48 = 240

Combine like terms:

18x - 48 = 240

Now, add 48 to both sides of the equation to isolate the term with x:

18x = 240 + 48 18x = 288

Finally, divide both sides by 18 to solve for x:

x = 288 / 18 x = 16

So, the solution to the first equation is x = 16.

2. 250 - 75 - 9 = 279

Perform the arithmetic operations:

250 - 75 - 9 = 166 - 9 = 157

So, the solution to the second equation is 157.

3. 16a - 7a + 96 = 222

Combine like terms:

9a + 96 = 222

Now, subtract 96 from both sides of the equation to isolate the term with a:

9a = 222 - 96 9a = 126

Finally, divide both sides by 9 to solve for a:

a = 126 / 9 a = 14

So, the solution to the third equation is a = 14.

4. 20y + 5y + y + 19 = 227

Combine like terms:

26y + 19 = 227

Now, subtract 19 from both sides of the equation to isolate the term with y:

26y = 227 - 19 26y = 208

Finally, divide both sides by 26 to solve for y:

y = 208 / 26 y = 8

So, the solution to the fourth equation is y = 8.