Question

(3х+1)(8х-7)-(4х-1)(6х-3)=15 решить Ответ должен быть х=5

Answer 1

(3x+1)(8x-7)-(4x-1)(6x-3)=15

24x²+8x-21x-7-(24x²-6x-12x+3)=15

24x²-13x-7-24x²+18x-3=15

5x=15+10

5x=25 |÷5

x=5.

Ответ: x=5.

Answer 2

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Answer 3

To solve the equation, we need to find the value of 'x' that satisfies the equation:

(3x + 1)(8x - 7) - (4x - 1)(6x - 3) = 15

Let's solve it step by step:

Expand the expressions:

(3x + 1)(8x - 7) = 24x^2 - 21x + 8x - 7 = 24x^2 - 13x - 7 (4x - 1)(6x - 3) = 24x^2 - 12x - 6x + 3 = 24x^2 - 18x + 3

Now, substitute back into the original equation:

(24x^2 - 13x - 7) - (24x^2 - 18x + 3) = 15

Simplify:

24x^2 - 13x - 7 - 24x^2 + 18x - 3 = 15

Combine like terms:

5x - 10 = 15

Now, isolate 'x' on one side of the equation:

5x = 15 + 10

5x = 25

Finally, divide by 5 to solve for 'x':

x = 25 / 5

x = 5

So, the correct value of 'x' is indeed x = 5. The answer you provided is correct.