5(2r+6)=8(5r-45)

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Solution for 5(2r+6)=8(5r-45) equation:


Simplifying
5(2r + 6) = 8(5r + -45)

Reorder the terms:
5(6 + 2r) = 8(5r + -45)
(6 * 5 + 2r * 5) = 8(5r + -45)
(30 + 10r) = 8(5r + -45)

Reorder the terms:
30 + 10r = 8(-45 + 5r)
30 + 10r = (-45 * 8 + 5r * 8)
30 + 10r = (-360 + 40r)

Solving
30 + 10r = -360 + 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.
30 + 10r + -40r = -360 + 40r + -40r

Combine like terms: 10r + -40r = -30r
30 + -30r = -360 + 40r + -40r

Combine like terms: 40r + -40r = 0
30 + -30r = -360 + 0
30 + -30r = -360

Add '-30' to each side of the equation.
30 + -30 + -30r = -360 + -30

Combine like terms: 30 + -30 = 0
0 + -30r = -360 + -30
-30r = -360 + -30

Combine like terms: -360 + -30 = -390
-30r = -390

Divide each side by '-30'.
r = 13

Simplifying
r = 13

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