3(r-7)=4(2-2r)+4

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Solution for 3(r-7)=4(2-2r)+4 equation:


Simplifying
3(r + -7) = 4(2 + -2r) + 4

Reorder the terms:
3(-7 + r) = 4(2 + -2r) + 4
(-7 * 3 + r * 3) = 4(2 + -2r) + 4
(-21 + 3r) = 4(2 + -2r) + 4
-21 + 3r = (2 * 4 + -2r * 4) + 4
-21 + 3r = (8 + -8r) + 4

Reorder the terms:
-21 + 3r = 8 + 4 + -8r

Combine like terms: 8 + 4 = 12
-21 + 3r = 12 + -8r

Solving
-21 + 3r = 12 + -8r

Solving for variable 'r'.

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

Add '8r' to each side of the equation.
-21 + 3r + 8r = 12 + -8r + 8r

Combine like terms: 3r + 8r = 11r
-21 + 11r = 12 + -8r + 8r

Combine like terms: -8r + 8r = 0
-21 + 11r = 12 + 0
-21 + 11r = 12

Add '21' to each side of the equation.
-21 + 21 + 11r = 12 + 21

Combine like terms: -21 + 21 = 0
0 + 11r = 12 + 21
11r = 12 + 21

Combine like terms: 12 + 21 = 33
11r = 33

Divide each side by '11'.
r = 3

Simplifying
r = 3

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