21=-4.9x+25x

Solution for 21=-4.9x+25x equation:

Simplifying
21 = -4.9x + 25x

Combine like terms: -4.9x + 25x = 20.1x
21 = 20.1x

Solving
21 = 20.1x

Solving for variable 'x'.

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

Add '-20.1x' to each side of the equation.
21 + -20.1x = 20.1x + -20.1x

Combine like terms: 20.1x + -20.1x = 0.0
21 + -20.1x = 0.0

Add '-21' to each side of the equation.
21 + -21 + -20.1x = 0.0 + -21

Combine like terms: 21 + -21 = 0
0 + -20.1x = 0.0 + -21
-20.1x = 0.0 + -21

Combine like terms: 0.0 + -21 = -21
-20.1x = -21

Divide each side by '-20.1'.
x = 1.044776119

Simplifying
x = 1.044776119