69=-8(r-1)+8(7+r)

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Solution for 69=-8(r-1)+8(7+r) equation: 


Simplifying
69 = -8(r + -1) + 8(7 + r)

Reorder the terms:
69 = -8(-1 + r) + 8(7 + r)
69 = (-1 * -8 + r * -8) + 8(7 + r)
69 = (8 + -8r) + 8(7 + r)
69 = 8 + -8r + (7 * 8 + r * 8)
69 = 8 + -8r + (56 + 8r)

Reorder the terms:
69 = 8 + 56 + -8r + 8r

Combine like terms: 8 + 56 = 64
69 = 64 + -8r + 8r

Combine like terms: -8r + 8r = 0
69 = 64 + 0
69 = 64

Solving
69 = 64

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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