Question

1000x+(444x-399x)-(685x+353x) при x=7

Answer 1

1000x+45x-1038x = 1045x - 1038x = 7x;
x = 7;
7x = 7*7 = 49.
Ответ: 49.

Answer 2

To find the value of the expression 1000x + (444x - 399x) - (685x + 353x) when x = 7, we can substitute the value of x into the expression and simplify it step by step.

Let's start by substituting x = 7 into the expression:

1000(7) + (444(7) - 399(7)) - (685(7) + 353(7))

Now, let's simplify each part of the expression:

1000(7) = 7000 444(7) = 3108 399(7) = 2793 685(7) = 4795 353(7) = 2471

Substituting these values into the expression, we have:

7000 + (3108 - 2793) - (4795 + 2471)

Now, let's simplify the brackets:

3108 - 2793 = 315 4795 + 2471 = 7266

Substituting these values back into the expression, we have:

7000 + 315 - 7266

Now, let's simplify the addition and subtraction:

7000 + 315 = 7315 7315 - 7266 = 49

Therefore, when x = 7, the value of the expression 1000x + (444x - 399x) - (685x + 353x) is 49.