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

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


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

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

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

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

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

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

Solving
1r = -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.
1r + r = -1r + r

Combine like terms: 1r + r = 2r
2r = -1r + r

Combine like terms: -1r + r = 0
2r = 0

Divide each side by '2'.
r = 0

Simplifying
r = 0

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