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

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


Simplifying
3(-4 + r) = 7r + -1(r + 3)
(-4 * 3 + r * 3) = 7r + -1(r + 3)
(-12 + 3r) = 7r + -1(r + 3)

Reorder the terms:
-12 + 3r = 7r + -1(3 + r)
-12 + 3r = 7r + (3 * -1 + r * -1)
-12 + 3r = 7r + (-3 + -1r)

Reorder the terms:
-12 + 3r = -3 + 7r + -1r

Combine like terms: 7r + -1r = 6r
-12 + 3r = -3 + 6r

Solving
-12 + 3r = -3 + 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.
-12 + 3r + -6r = -3 + 6r + -6r

Combine like terms: 3r + -6r = -3r
-12 + -3r = -3 + 6r + -6r

Combine like terms: 6r + -6r = 0
-12 + -3r = -3 + 0
-12 + -3r = -3

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

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

Combine like terms: -3 + 12 = 9
-3r = 9

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

Simplifying
r = -3

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