40*2r=30(2r+6)-20r

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Solution for 40*2r=30(2r+6)-20r equation:


Simplifying
40 * 2r = 30(2r + 6) + -20r

Multiply 40 * 2
80r = 30(2r + 6) + -20r

Reorder the terms:
80r = 30(6 + 2r) + -20r
80r = (6 * 30 + 2r * 30) + -20r
80r = (180 + 60r) + -20r

Combine like terms: 60r + -20r = 40r
80r = 180 + 40r

Solving
80r = 180 + 40r

Solving for variable 'r'.

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

Add '-40r' to each side of the equation.
80r + -40r = 180 + 40r + -40r

Combine like terms: 80r + -40r = 40r
40r = 180 + 40r + -40r

Combine like terms: 40r + -40r = 0
40r = 180 + 0
40r = 180

Divide each side by '40'.
r = 4.5

Simplifying
r = 4.5

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