3[7r-7]=-6+6r

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Solution for 3[7r-7]=-6+6r equation:


Simplifying
3[7r + -7] = -6 + 6r

Reorder the terms:
3[-7 + 7r] = -6 + 6r
[-7 * 3 + 7r * 3] = -6 + 6r
[-21 + 21r] = -6 + 6r

Solving
-21 + 21r = -6 + 6r

Solving for variable 'r'.

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

Add '-6r' to each side of the equation.
-21 + 21r + -6r = -6 + 6r + -6r

Combine like terms: 21r + -6r = 15r
-21 + 15r = -6 + 6r + -6r

Combine like terms: 6r + -6r = 0
-21 + 15r = -6 + 0
-21 + 15r = -6

Add '21' to each side of the equation.
-21 + 21 + 15r = -6 + 21

Combine like terms: -21 + 21 = 0
0 + 15r = -6 + 21
15r = -6 + 21

Combine like terms: -6 + 21 = 15
15r = 15

Divide each side by '15'.
r = 1

Simplifying
r = 1

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