if 2x =-4 then what is the value of 8x
If 2x = -4, then dividing both sides of the equation by 2 gives x = -2.
Substituting this value of x in the expression 8x gives
8(-2) = -16.
Therefore, the value of 8x is -16.
To find the value of 8x when 2x = -4, we'll first solve for x.
Given that 2x = -4, we can find the value of x by dividing both sides of the equation by 2.
Dividing both sides by 2, we get:
2x/2 = -4/2
Simplifying, we have:
x = -2
Now that we know the value of x is -2, we can substitute it into the expression 8x.
Replacing x with -2, we have:
8 * (-2) = -16
Therefore, the value of 8x when 2x = -4 is -16.
To find the value of 8x, we can start by dividing both sides of the equation 2x = -4 by 2.
Dividing both sides by 2:
2x/2 = -4/2
This simplifies to:
x = -2
Now that we know the value of x, we can substitute it back into the expression 8x to find the value of 8x.
Substituting x = -2 into 8x:
8(-2) = -16
Therefore, the value of 8x is -16.