Question

Solve 2x+4 so that it has one solution

Answer 1

Answer:

-2

Step-by-step explanation:

We can set it equal to zero

2x+4 = 0

2x =-4

x = -2

Answer 2

Answer:

x = -2

Step-by-step explanation:

To solve for variables, we need the equation to be set equal to something. If no other number is given, assume zero.

2x + 4 = 0

Move 4 to the right by subtracting it from the left and right (since it is being added).

2x = -4

Next, isolate x by dividing both sides by 2 (since x is being multiplied by 2)

x = -2

We can check that this is correct by plugging in -2 for x and seeing if we get zero.

2(-2) + 4 = 0

-4 + 4 = 0

0 = 0