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

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


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

Reorder the terms:
0 = 3(7 + 2r) + 3(3r + -5)
0 = (7 * 3 + 2r * 3) + 3(3r + -5)
0 = (21 + 6r) + 3(3r + -5)

Reorder the terms:
0 = 21 + 6r + 3(-5 + 3r)
0 = 21 + 6r + (-5 * 3 + 3r * 3)
0 = 21 + 6r + (-15 + 9r)

Reorder the terms:
0 = 21 + -15 + 6r + 9r

Combine like terms: 21 + -15 = 6
0 = 6 + 6r + 9r

Combine like terms: 6r + 9r = 15r
0 = 6 + 15r

Solving
0 = 6 + 15r

Solving for variable 'r'.

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

Add '-15r' to each side of the equation.
0 + -15r = 6 + 15r + -15r
Remove the zero:
-15r = 6 + 15r + -15r

Combine like terms: 15r + -15r = 0
-15r = 6 + 0
-15r = 6

Divide each side by '-15'.
r = -0.4

Simplifying
r = -0.4

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