Question

К×5-64=249?как решить (118-х)×8=312?

Answer 1

Ответ:

Пошаговое объяснение:

к×5-64=249

5k = 249 + 64

5k = 313

k = 313 : 5

k = 62,6

(118-х)×8=312

118 - x = 312 : 8

118 - x = 39

x = 118 - 39

x = 79

Answer 2

Відповідь:

Вот я сделала (только второй)

Покрокове пояснення:

Answer 3

To solve the equations, follow these steps:

1. К×5 - 64 = 249
2. (118 - х)×8 = 312

Let's solve each equation one by one:

1. К×5 - 64 = 249

Step 1: Move the constant term (-64) to the other side of the equation by adding 64 to both sides: К×5 = 249 + 64 К×5 = 313

Step 2: Now, isolate К by dividing both sides by 5: К = 313 ÷ 5 К = 62.6

So, the value of К is 62.6.

2. (118 - х)×8 = 312

Step 1: First, simplify the expression on the left side of the equation: 8(118 - х) = 312

Step 2: Divide both sides by 8 to solve for (118 - х): 118 - х = 312 ÷ 8 118 - х = 39

Step 3: Now, isolate х by subtracting 118 from both sides: -х = 39 - 118 -х = -79

Step 4: To get the value of х, divide both sides by -1: х = -79 ÷ -1 х = 79

So, the value of х is 79.

Therefore, the solutions to the equations are К = 62.6 and х = 79.