3(-7+5r)=5r-31

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Solution for 3(-7+5r)=5r-31 equation:


Simplifying
3(-7 + 5r) = 5r + -31
(-7 * 3 + 5r * 3) = 5r + -31
(-21 + 15r) = 5r + -31

Reorder the terms:
-21 + 15r = -31 + 5r

Solving
-21 + 15r = -31 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
-21 + 15r + -5r = -31 + 5r + -5r

Combine like terms: 15r + -5r = 10r
-21 + 10r = -31 + 5r + -5r

Combine like terms: 5r + -5r = 0
-21 + 10r = -31 + 0
-21 + 10r = -31

Add '21' to each side of the equation.
-21 + 21 + 10r = -31 + 21

Combine like terms: -21 + 21 = 0
0 + 10r = -31 + 21
10r = -31 + 21

Combine like terms: -31 + 21 = -10
10r = -10

Divide each side by '10'.
r = -1

Simplifying
r = -1

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