Understand the equation: Understand the equation and what it means for it to be equal to zero.The equation 7(2z−4)=0 implies that the product of 7 and (2z−4) is zero. For a product to be zero, at least one of the factors must be zero. In this case, since 7 is not zero, the factor (2z−4) must be zero.
Set factor equal: Set the factor (2z−4) equal to zero.To find the value of z, we need to solve the equation 2z−4=0.
Solve for z: Solve for z.Add 4 to both sides of the equation to isolate the term with z on one side:2z−4+4=0+4This simplifies to:2z=4
Divide to solve: Divide both sides of the equation by 2 to solve for z. 22z=24This simplifies to:z=2