2.1=0.8z

Solution for 2.1=0.8z equation:

Simplifying
2.1 = 0.8z

Solving
2.1 = 0.8z

Solving for variable 'z'.

Move all terms containing z to the left, all other terms to the right.

Add '-0.8z' to each side of the equation.
2.1 + -0.8z = 0.8z + -0.8z

Combine like terms: 0.8z + -0.8z = 0.0
2.1 + -0.8z = 0.0

Add '-2.1' to each side of the equation.
2.1 + -2.1 + -0.8z = 0.0 + -2.1

Combine like terms: 2.1 + -2.1 = 0.0
0.0 + -0.8z = 0.0 + -2.1
-0.8z = 0.0 + -2.1

Combine like terms: 0.0 + -2.1 = -2.1
-0.8z = -2.1

Divide each side by '-0.8'.
z = 2.625

Simplifying
z = 2.625