30+9r=7(1-r)-8r

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Solution for 30+9r=7(1-r)-8r equation:


Simplifying
30 + 9r = 7(1 + -1r) + -8r
30 + 9r = (1 * 7 + -1r * 7) + -8r
30 + 9r = (7 + -7r) + -8r

Combine like terms: -7r + -8r = -15r
30 + 9r = 7 + -15r

Solving
30 + 9r = 7 + -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.
30 + 9r + 15r = 7 + -15r + 15r

Combine like terms: 9r + 15r = 24r
30 + 24r = 7 + -15r + 15r

Combine like terms: -15r + 15r = 0
30 + 24r = 7 + 0
30 + 24r = 7

Add '-30' to each side of the equation.
30 + -30 + 24r = 7 + -30

Combine like terms: 30 + -30 = 0
0 + 24r = 7 + -30
24r = 7 + -30

Combine like terms: 7 + -30 = -23
24r = -23

Divide each side by '24'.
r = -0.9583333333

Simplifying
r = -0.9583333333

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