-7[-10r-1]+2=-75

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Solution for -7[-10r-1]+2=-75 equation:


Simplifying
-7[-10r + -1] + 2 = -75

Reorder the terms:
-7[-1 + -10r] + 2 = -75
[-1 * -7 + -10r * -7] + 2 = -75
[7 + 70r] + 2 = -75

Reorder the terms:
7 + 2 + 70r = -75

Combine like terms: 7 + 2 = 9
9 + 70r = -75

Solving
9 + 70r = -75

Solving for variable 'r'.

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

Add '-9' to each side of the equation.
9 + -9 + 70r = -75 + -9

Combine like terms: 9 + -9 = 0
0 + 70r = -75 + -9
70r = -75 + -9

Combine like terms: -75 + -9 = -84
70r = -84

Divide each side by '70'.
r = -1.2

Simplifying
r = -1.2

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