7(3-r)=-6(6-2r)

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Solution for 7(3-r)=-6(6-2r) equation:


Simplifying
7(3 + -1r) = -6(6 + -2r)
(3 * 7 + -1r * 7) = -6(6 + -2r)
(21 + -7r) = -6(6 + -2r)
21 + -7r = (6 * -6 + -2r * -6)
21 + -7r = (-36 + 12r)

Solving
21 + -7r = -36 + 12r

Solving for variable 'r'.

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

Add '-12r' to each side of the equation.
21 + -7r + -12r = -36 + 12r + -12r

Combine like terms: -7r + -12r = -19r
21 + -19r = -36 + 12r + -12r

Combine like terms: 12r + -12r = 0
21 + -19r = -36 + 0
21 + -19r = -36

Add '-21' to each side of the equation.
21 + -21 + -19r = -36 + -21

Combine like terms: 21 + -21 = 0
0 + -19r = -36 + -21
-19r = -36 + -21

Combine like terms: -36 + -21 = -57
-19r = -57

Divide each side by '-19'.
r = 3

Simplifying
r = 3

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