Question

-7x-9=-2x+31 solve for x

Answer 1

x = -8

Explanation:

-7x-9=-2x+31 solve for x

-7x - 9 = -2x + 31

-7x + 2x = 31 + 9

-5x = 40

x = 40 : (-5)

x = -8

----------------------------

check

-7(-8) -9 = -2(-8) + 31

56 - 9 = 16 + 31

47 = 47

Answer 2

X= -8

Rearrange variables to the left side of the equation: - 7 x + 2 x = 31 + 9Combine like terms: - 5 x = 31 + 9Calculate the sum or difference: - 5 x = 40Divide both sides of the equation by the coefficient of variable: x = - \dfrac{40}{5}Cross out the common factor: x = - 8Rearrange variables to the left side of the equation: −7x+2x=31+9Combine like terms: −5x=31+9Calculate the sum or difference: −5x=40Divide both sides of the equation by the coefficient of variable: x=−405Cross out the common factor: x=−8