-2.8(3r-7)-4.2r=

Solution for -2.8(3r-7)-4.2r= equation:

Simplifying
-2.8(3r + -7) + -4.2r = 0

Reorder the terms:
-2.8(-7 + 3r) + -4.2r = 0
(-7 * -2.8 + 3r * -2.8) + -4.2r = 0
(19.6 + -8.4r) + -4.2r = 0

Combine like terms: -8.4r + -4.2r = -12.6r
19.6 + -12.6r = 0

Solving
19.6 + -12.6r = 0

Solving for variable 'r'.

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

Add '-19.6' to each side of the equation.
19.6 + -19.6 + -12.6r = 0 + -19.6

Combine like terms: 19.6 + -19.6 = 0.0
0.0 + -12.6r = 0 + -19.6
-12.6r = 0 + -19.6

Combine like terms: 0 + -19.6 = -19.6
-12.6r = -19.6

Divide each side by '-12.6'.
r = 1.555555556

Simplifying
r = 1.555555556