4+8(1+9r)=19

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Solution for 4+8(1+9r)=19 equation: 


Simplifying
4 + 8(1 + 9r) = 19
4 + (1 * 8 + 9r * 8) = 19
4 + (8 + 72r) = 19

Combine like terms: 4 + 8 = 12
12 + 72r = 19

Solving
12 + 72r = 19

Solving for variable 'r'.

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

Add '-12' to each side of the equation.
12 + -12 + 72r = 19 + -12

Combine like terms: 12 + -12 = 0
0 + 72r = 19 + -12
72r = 19 + -12

Combine like terms: 19 + -12 = 7
72r = 7

Divide each side by '72'.
r = 0.09722222222

Simplifying
r = 0.09722222222

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