r(1)=-1-3+1+7

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Solution for r(1)=-1-3+1+7 equation: 


Simplifying
r(1) = -1 + -3 + 1 + 7

Reorder the terms for easier multiplication:
1r = -1 + -3 + 1 + 7

Combine like terms: -1 + -3 = -4
1r = -4 + 1 + 7

Combine like terms: -4 + 1 = -3
1r = -3 + 7

Combine like terms: -3 + 7 = 4
1r = 4

Solving
1r = 4

Solving for variable 'r'.

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

Divide each side by '1'.
r = 4

Simplifying
r = 4

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