Question

900-9•?=450 ?+40•?=560 ?+5•?=850

Answer 1

900-9•50=450
200+40•9=560
400+5•90=850

Удачи :)

Answer 2

Let's solve these equations one by one:

1. 900 - 9•? = 450

We want to find the value of "?", so let's isolate it on one side of the equation:

900 - 9•? = 450

Subtract 900 from both sides:

-9•? = 450 - 900

Simplify:

-9•? = -450

Divide both sides by -9:

? = -450 / (-9)

Simplify:

? = 50

Therefore, the solution to the equation 900 - 9•? = 450 is ? = 50.

2. ? + 40•? = 560

Again, we want to find the value of "?". Let's isolate it on one side of the equation:

? + 40•? = 560

Combine like terms:

41•? = 560

Divide both sides by 41:

? = 560 / 41

Simplify:

? ≈ 13.6585 (rounded to four decimal places)

Therefore, the solution to the equation ? + 40•? = 560 is ? ≈ 13.6585.

3. ? + 5•? = 850

Let's isolate "?":

? + 5•? = 850

Combine like terms:

6•? = 850

Divide both sides by 6:

? = 850 / 6

Simplify:

? ≈ 141.6667 (rounded to four decimal places)

Therefore, the solution to the equation ? + 5•? = 850 is ? ≈ 141.6667.