7+3(2r-5)-3(4r+4)-7=

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Solution for 7+3(2r-5)-3(4r+4)-7= equation:


Simplifying
7 + 3(2r + -5) + -3(4r + 4) + -7 = 0

Reorder the terms:
7 + 3(-5 + 2r) + -3(4r + 4) + -7 = 0
7 + (-5 * 3 + 2r * 3) + -3(4r + 4) + -7 = 0
7 + (-15 + 6r) + -3(4r + 4) + -7 = 0

Reorder the terms:
7 + -15 + 6r + -3(4 + 4r) + -7 = 0
7 + -15 + 6r + (4 * -3 + 4r * -3) + -7 = 0
7 + -15 + 6r + (-12 + -12r) + -7 = 0

Reorder the terms:
7 + -15 + -12 + -7 + 6r + -12r = 0

Combine like terms: 7 + -15 = -8
-8 + -12 + -7 + 6r + -12r = 0

Combine like terms: -8 + -12 = -20
-20 + -7 + 6r + -12r = 0

Combine like terms: -20 + -7 = -27
-27 + 6r + -12r = 0

Combine like terms: 6r + -12r = -6r
-27 + -6r = 0

Solving
-27 + -6r = 0

Solving for variable 'r'.

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

Add '27' to each side of the equation.
-27 + 27 + -6r = 0 + 27

Combine like terms: -27 + 27 = 0
0 + -6r = 0 + 27
-6r = 0 + 27

Combine like terms: 0 + 27 = 27
-6r = 27

Divide each side by '-6'.
r = -4.5

Simplifying
r = -4.5

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