2(r-4)=4[r+(-7)]

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


Simplifying
2(r + -4) = 4[r + (-7)]

Reorder the terms:
2(-4 + r) = 4[r + (-7)]
(-4 * 2 + r * 2) = 4[r + (-7)]
(-8 + 2r) = 4[r + (-7)]
-8 + 2r = 4[r + -7]

Reorder the terms:
-8 + 2r = 4[-7 + r]
-8 + 2r = [-7 * 4 + r * 4]
-8 + 2r = [-28 + 4r]

Solving
-8 + 2r = -28 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
-8 + 2r + -4r = -28 + 4r + -4r

Combine like terms: 2r + -4r = -2r
-8 + -2r = -28 + 4r + -4r

Combine like terms: 4r + -4r = 0
-8 + -2r = -28 + 0
-8 + -2r = -28

Add '8' to each side of the equation.
-8 + 8 + -2r = -28 + 8

Combine like terms: -8 + 8 = 0
0 + -2r = -28 + 8
-2r = -28 + 8

Combine like terms: -28 + 8 = -20
-2r = -20

Divide each side by '-2'.
r = 10

Simplifying
r = 10

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