8-(1+4r)=-7(-2r-1)+7r

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Solution for 8-(1+4r)=-7(-2r-1)+7r equation:


Simplifying
8 + -1(1 + 4r) = -7(-2r + -1) + 7r
8 + (1 * -1 + 4r * -1) = -7(-2r + -1) + 7r
8 + (-1 + -4r) = -7(-2r + -1) + 7r

Combine like terms: 8 + -1 = 7
7 + -4r = -7(-2r + -1) + 7r

Reorder the terms:
7 + -4r = -7(-1 + -2r) + 7r
7 + -4r = (-1 * -7 + -2r * -7) + 7r
7 + -4r = (7 + 14r) + 7r

Combine like terms: 14r + 7r = 21r
7 + -4r = 7 + 21r

Add '-7' to each side of the equation.
7 + -7 + -4r = 7 + -7 + 21r

Combine like terms: 7 + -7 = 0
0 + -4r = 7 + -7 + 21r
-4r = 7 + -7 + 21r

Combine like terms: 7 + -7 = 0
-4r = 0 + 21r
-4r = 21r

Solving
-4r = 21r

Solving for variable 'r'.

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

Add '-21r' to each side of the equation.
-4r + -21r = 21r + -21r

Combine like terms: -4r + -21r = -25r
-25r = 21r + -21r

Combine like terms: 21r + -21r = 0
-25r = 0

Divide each side by '-25'.
r = 0

Simplifying
r = 0

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