3r-2(5r+7)=-5-2(r+12)

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Solution for 3r-2(5r+7)=-5-2(r+12) equation:


Simplifying
3r + -2(5r + 7) = -5 + -2(r + 12)

Reorder the terms:
3r + -2(7 + 5r) = -5 + -2(r + 12)
3r + (7 * -2 + 5r * -2) = -5 + -2(r + 12)
3r + (-14 + -10r) = -5 + -2(r + 12)

Reorder the terms:
-14 + 3r + -10r = -5 + -2(r + 12)

Combine like terms: 3r + -10r = -7r
-14 + -7r = -5 + -2(r + 12)

Reorder the terms:
-14 + -7r = -5 + -2(12 + r)
-14 + -7r = -5 + (12 * -2 + r * -2)
-14 + -7r = -5 + (-24 + -2r)

Combine like terms: -5 + -24 = -29
-14 + -7r = -29 + -2r

Solving
-14 + -7r = -29 + -2r

Solving for variable 'r'.

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

Add '2r' to each side of the equation.
-14 + -7r + 2r = -29 + -2r + 2r

Combine like terms: -7r + 2r = -5r
-14 + -5r = -29 + -2r + 2r

Combine like terms: -2r + 2r = 0
-14 + -5r = -29 + 0
-14 + -5r = -29

Add '14' to each side of the equation.
-14 + 14 + -5r = -29 + 14

Combine like terms: -14 + 14 = 0
0 + -5r = -29 + 14
-5r = -29 + 14

Combine like terms: -29 + 14 = -15
-5r = -15

Divide each side by '-5'.
r = 3

Simplifying
r = 3

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