19=7r-2(3+4r)

Solution for 19=7r-2(3+4r) equation:

Simplifying
19 = 7r + -2(3 + 4r)
19 = 7r + (3 * -2 + 4r * -2)
19 = 7r + (-6 + -8r)

Reorder the terms:
19 = -6 + 7r + -8r

Combine like terms: 7r + -8r = -1r
19 = -6 + -1r

Solving
19 = -6 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
19 + r = -6 + -1r + r

Combine like terms: -1r + r = 0
19 + r = -6 + 0
19 + r = -6

Add '-19' to each side of the equation.
19 + -19 + r = -6 + -19

Combine like terms: 19 + -19 = 0
0 + r = -6 + -19
r = -6 + -19

Combine like terms: -6 + -19 = -25
r = -25

Simplifying
r = -25