231=7(5-4r)

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Solution for 231=7(5-4r) equation: 


Simplifying
231 = 7(5 + -4r)
231 = (5 * 7 + -4r * 7)
231 = (35 + -28r)

Solving
231 = 35 + -28r

Solving for variable 'r'.

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

Add '28r' to each side of the equation.
231 + 28r = 35 + -28r + 28r

Combine like terms: -28r + 28r = 0
231 + 28r = 35 + 0
231 + 28r = 35

Add '-231' to each side of the equation.
231 + -231 + 28r = 35 + -231

Combine like terms: 231 + -231 = 0
0 + 28r = 35 + -231
28r = 35 + -231

Combine like terms: 35 + -231 = -196
28r = -196

Divide each side by '28'.
r = -7

Simplifying
r = -7

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