3r=10(r-20)

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Solution for 3r=10(r-20) equation:


Simplifying
3r = 10(r + -20)

Reorder the terms:
3r = 10(-20 + r)
3r = (-20 * 10 + r * 10)
3r = (-200 + 10r)

Solving
3r = -200 + 10r

Solving for variable 'r'.

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

Add '-10r' to each side of the equation.
3r + -10r = -200 + 10r + -10r

Combine like terms: 3r + -10r = -7r
-7r = -200 + 10r + -10r

Combine like terms: 10r + -10r = 0
-7r = -200 + 0
-7r = -200

Divide each side by '-7'.
r = 28.57142857

Simplifying
r = 28.57142857

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