-3(r-7)-3(5r+4)-15r=

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Solution for -3(r-7)-3(5r+4)-15r= equation:


Simplifying
-3(r + -7) + -3(5r + 4) + -15r = 0

Reorder the terms:
-3(-7 + r) + -3(5r + 4) + -15r = 0
(-7 * -3 + r * -3) + -3(5r + 4) + -15r = 0
(21 + -3r) + -3(5r + 4) + -15r = 0

Reorder the terms:
21 + -3r + -3(4 + 5r) + -15r = 0
21 + -3r + (4 * -3 + 5r * -3) + -15r = 0
21 + -3r + (-12 + -15r) + -15r = 0

Reorder the terms:
21 + -12 + -3r + -15r + -15r = 0

Combine like terms: 21 + -12 = 9
9 + -3r + -15r + -15r = 0

Combine like terms: -3r + -15r = -18r
9 + -18r + -15r = 0

Combine like terms: -18r + -15r = -33r
9 + -33r = 0

Solving
9 + -33r = 0

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 + -33r = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -33r = 0 + -9
-33r = 0 + -9

Combine like terms: 0 + -9 = -9
-33r = -9

Divide each side by '-33'.
r = 0.2727272727

Simplifying
r = 0.2727272727

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