Question

(7-5x)-(8-4x)(+5x+6)=8

Answer 1

(7-5x)-(8-4x)+(5x+6)=8

7-5x-8+4x+5x+6=8

4x=3

x=3/4

x=0.75

Answer 2

(7-5x)-(8-4x)+(5x+6)=8

7-5x-8+4x+5x+6=8

4x=3

x=3:4

x=0,75

Answer 3

Let's first simplify the expression on the left side of the equation:

(7-5x)-(8-4x)(+5x+6) = 8

7 - 5x - (40x^2 + 46x - 48) = 8 // Using the distributive property

7 - 5x - 40x^2 - 46x + 48 = 8 // Distributing the negative sign

-40x^2 - 51x + 47 = 8 - 7 // Combining like terms

-40x^2 - 51x + 39 = 0 // Simplifying the right side

Now, we can use the quadratic formula to solve for x:

x = (-b ± √(b^2 - 4ac)) / (2a)

where a = -40, b = -51, and c = 39.

Plugging in these values, we get:

x = (-(-51) ± √((-51)^2 - 4(-40)(39))) / (2(-40))

x = (51 ± √(2601 + 6240)) / (-80)

x = (51 ± √8841) / (-80)

x = (51 ± 94) / (-80)

x = -1.425 or x = -1.05

Therefore, the solutions to the equation are x = -1.425 and x = -1.05.