Solving:
\(4 = 0.25(w - 4.3)\)
Delete the first parentheses by the distributive property, with the distributive property, we multiply the '0.25' first:
\(4 = 0.25w - 1.075\)
Now, put the numbers with letter (incognito) to the right and numbers without letter to the left, changing the signal when changing sides.
\(- 0.25w = - 4 - 1.075\)
\(- 0.25w = - 5.075\)
simplify by (-1)
\(- 0.25w = - 5.075\:*(-1)\)
\(0.25w = 5.075\)
\(w = \frac{5.075}{0.25}\)
\(\boxed{\boxed{w = 20.3}}\end{array}}\qquad\quad\checkmark\)
