-28-7r=4(-3r-3)+3r

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Solution for -28-7r=4(-3r-3)+3r equation:


Simplifying
-28 + -7r = 4(-3r + -3) + 3r

Reorder the terms:
-28 + -7r = 4(-3 + -3r) + 3r
-28 + -7r = (-3 * 4 + -3r * 4) + 3r
-28 + -7r = (-12 + -12r) + 3r

Combine like terms: -12r + 3r = -9r
-28 + -7r = -12 + -9r

Solving
-28 + -7r = -12 + -9r

Solving for variable 'r'.

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

Add '9r' to each side of the equation.
-28 + -7r + 9r = -12 + -9r + 9r

Combine like terms: -7r + 9r = 2r
-28 + 2r = -12 + -9r + 9r

Combine like terms: -9r + 9r = 0
-28 + 2r = -12 + 0
-28 + 2r = -12

Add '28' to each side of the equation.
-28 + 28 + 2r = -12 + 28

Combine like terms: -28 + 28 = 0
0 + 2r = -12 + 28
2r = -12 + 28

Combine like terms: -12 + 28 = 16
2r = 16

Divide each side by '2'.
r = 8

Simplifying
r = 8

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