-(r-3-7p)=0

Solution for -(r-3-7p)=0 equation:

Simplifying
-1(r + -3 + -7p) = 0

Reorder the terms:
-1(-3 + -7p + r) = 0
(-3 * -1 + -7p * -1 + r * -1) = 0
(3 + 7p + -1r) = 0

Solving
3 + 7p + -1r = 0

Solving for variable 'p'.

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

Add '-3' to each side of the equation.
3 + 7p + -3 + -1r = 0 + -3

Reorder the terms:
3 + -3 + 7p + -1r = 0 + -3

Combine like terms: 3 + -3 = 0
0 + 7p + -1r = 0 + -3
7p + -1r = 0 + -3

Combine like terms: 0 + -3 = -3
7p + -1r = -3

Add 'r' to each side of the equation.
7p + -1r + r = -3 + r

Combine like terms: -1r + r = 0
7p + 0 = -3 + r
7p = -3 + r

Divide each side by '7'.
p = -0.4285714286 + 0.1428571429r

Simplifying
p = -0.4285714286 + 0.1428571429r