-9(6r+7)+7(2r+6)=

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Solution for -9(6r+7)+7(2r+6)= equation:


Simplifying
-9(6r + 7) + 7(2r + 6) = 0

Reorder the terms:
-9(7 + 6r) + 7(2r + 6) = 0
(7 * -9 + 6r * -9) + 7(2r + 6) = 0
(-63 + -54r) + 7(2r + 6) = 0

Reorder the terms:
-63 + -54r + 7(6 + 2r) = 0
-63 + -54r + (6 * 7 + 2r * 7) = 0
-63 + -54r + (42 + 14r) = 0

Reorder the terms:
-63 + 42 + -54r + 14r = 0

Combine like terms: -63 + 42 = -21
-21 + -54r + 14r = 0

Combine like terms: -54r + 14r = -40r
-21 + -40r = 0

Solving
-21 + -40r = 0

Solving for variable 'r'.

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

Add '21' to each side of the equation.
-21 + 21 + -40r = 0 + 21

Combine like terms: -21 + 21 = 0
0 + -40r = 0 + 21
-40r = 0 + 21

Combine like terms: 0 + 21 = 21
-40r = 21

Divide each side by '-40'.
r = -0.525

Simplifying
r = -0.525

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