Question

(2х+3)(х-7)=(х+3)(2х+1)

Answer 1

2х²-14х+3х-21=2х²+х+6х+3
-11х-6х-х=3+21
-18х=24
х=-24/18=-4/3=-1 1/3
ответ: -1 1/3

Answer 2

Let's solve the given equation step by step:

(2x + 3)(x - 7) = (x + 3)(2x + 1)

Expanding both sides of the equation:

2x(x - 7) + 3(x - 7) = x(2x + 1) + 3(2x + 1)

Now, let's simplify each side:

2x^2 - 14x + 3x - 21 = 2x^2 + x + 6x + 3

Combining like terms:

2x^2 - 11x - 21 = 2x^2 + 7x + 3

Subtracting 2x^2 from both sides to eliminate it:

-11x - 21 = 7x + 3

Adding 11x to both sides:

-21 = 18x + 3

Subtracting 3 from both sides:

-24 = 18x

Dividing by 18:

x = -24/18

Simplifying the fraction:

x = -4/3

Therefore, the solution to the given equation is x = -4/3.