4(3r-3)=-3(r+7)

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Solution for 4(3r-3)=-3(r+7) equation:


Simplifying
4(3r + -3) = -3(r + 7)

Reorder the terms:
4(-3 + 3r) = -3(r + 7)
(-3 * 4 + 3r * 4) = -3(r + 7)
(-12 + 12r) = -3(r + 7)

Reorder the terms:
-12 + 12r = -3(7 + r)
-12 + 12r = (7 * -3 + r * -3)
-12 + 12r = (-21 + -3r)

Solving
-12 + 12r = -21 + -3r

Solving for variable 'r'.

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

Add '3r' to each side of the equation.
-12 + 12r + 3r = -21 + -3r + 3r

Combine like terms: 12r + 3r = 15r
-12 + 15r = -21 + -3r + 3r

Combine like terms: -3r + 3r = 0
-12 + 15r = -21 + 0
-12 + 15r = -21

Add '12' to each side of the equation.
-12 + 12 + 15r = -21 + 12

Combine like terms: -12 + 12 = 0
0 + 15r = -21 + 12
15r = -21 + 12

Combine like terms: -21 + 12 = -9
15r = -9

Divide each side by '15'.
r = -0.6

Simplifying
r = -0.6

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