Is -5 a solution to the equation: 3x + 4 = x + 8?

No, -5 is not the solution of 3x + 4 = x+8

Step-by-step explanation:

the actual solution of the equation 3x + 4 = x+ 8 is 2

Step-by-step explanation:

3x-x = 8-4

2x = 4

x = 4/2

x = 2

-5 isn't a solution to the given equation.

your answer is a

step-by-step explanation:

4*4*4*4=256

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15