Solve: 3x - 2x + 4 = 5x - 4x - 8
A)
3
B)
6
9
-3
no solution

no soution

Step-by-step explanation:

3x - 2x + 4 = 5x - 4x - 8

Combine like terms

x+4 = x-8

Subtract x from each side

x+4-x =x-x-8

4 = -8

This is never true so there is no solution

idk

step-by-step explanation:

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