Question

2x (x-4)-(x+6)(x+7)=718+x(x-8)

Answer 1

2x^2-8x-(x^2+6x+7x+42=718+x^2-8x;

2x^2-8x-x^2-6x-7x-42-718-x^2+8x=0;

-13x-760=0;

-13x=760;

x=-58.4615384615;

вроді так

Answer 2

Let's solve the equation step by step:

2x(x - 4) - (x + 6)(x + 7) = 718 + x(x - 8)

First, let's simplify the equation by expanding the parentheses:

2x^2 - 8x - (x^2 + 7x + 6x + 42) = 718 + x^2 - 8x

Simplify further:

2x^2 - 8x - x^2 - 7x - 6x - 42 = 718 + x^2 - 8x

Combine like terms:

x^2 - 23x - 42 = 718 + x^2 - 8x

The x^2 terms on both sides will cancel out:

-23x - 42 = 718 - 8x

Let's isolate the variable terms on one side and the constant terms on the other side:

-23x + 8x = 718 + 42

Combine like terms:

-15x = 760

Divide both sides by -15 to solve for x:

x = 760 / -15

Simplifying the fraction:

x = -50.67

Therefore, the solution to the equation is x = -50.67.