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

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


Simplifying
8(1 + 8r) + 7(7 + -7r) = 0
(1 * 8 + 8r * 8) + 7(7 + -7r) = 0
(8 + 64r) + 7(7 + -7r) = 0
8 + 64r + (7 * 7 + -7r * 7) = 0
8 + 64r + (49 + -49r) = 0

Reorder the terms:
8 + 49 + 64r + -49r = 0

Combine like terms: 8 + 49 = 57
57 + 64r + -49r = 0

Combine like terms: 64r + -49r = 15r
57 + 15r = 0

Solving
57 + 15r = 0

Solving for variable 'r'.

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

Add '-57' to each side of the equation.
57 + -57 + 15r = 0 + -57

Combine like terms: 57 + -57 = 0
0 + 15r = 0 + -57
15r = 0 + -57

Combine like terms: 0 + -57 = -57
15r = -57

Divide each side by '15'.
r = -3.8

Simplifying
r = -3.8

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