-3(2r-4)-7r=103

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Solution for -3(2r-4)-7r=103 equation:


Simplifying
-3(2r + -4) + -7r = 103

Reorder the terms:
-3(-4 + 2r) + -7r = 103
(-4 * -3 + 2r * -3) + -7r = 103
(12 + -6r) + -7r = 103

Combine like terms: -6r + -7r = -13r
12 + -13r = 103

Solving
12 + -13r = 103

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + -13r = 103 + -12

Combine like terms: 12 + -12 = 0
0 + -13r = 103 + -12
-13r = 103 + -12

Combine like terms: 103 + -12 = 91
-13r = 91

Divide each side by '-13'.
r = -7

Simplifying
r = -7

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