-6(r+7)=-90

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Solution for -6(r+7)=-90 equation:


Simplifying
-6(r + 7) = -90

Reorder the terms:
-6(7 + r) = -90
(7 * -6 + r * -6) = -90
(-42 + -6r) = -90

Solving
-42 + -6r = -90

Solving for variable 'r'.

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

Add '42' to each side of the equation.
-42 + 42 + -6r = -90 + 42

Combine like terms: -42 + 42 = 0
0 + -6r = -90 + 42
-6r = -90 + 42

Combine like terms: -90 + 42 = -48
-6r = -48

Divide each side by '-6'.
r = 8

Simplifying
r = 8

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