2(4r-5)+6(r+2)=8(r-5)

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Solution for 2(4r-5)+6(r+2)=8(r-5) equation:


Simplifying
2(4r + -5) + 6(r + 2) = 8(r + -5)

Reorder the terms:
2(-5 + 4r) + 6(r + 2) = 8(r + -5)
(-5 * 2 + 4r * 2) + 6(r + 2) = 8(r + -5)
(-10 + 8r) + 6(r + 2) = 8(r + -5)

Reorder the terms:
-10 + 8r + 6(2 + r) = 8(r + -5)
-10 + 8r + (2 * 6 + r * 6) = 8(r + -5)
-10 + 8r + (12 + 6r) = 8(r + -5)

Reorder the terms:
-10 + 12 + 8r + 6r = 8(r + -5)

Combine like terms: -10 + 12 = 2
2 + 8r + 6r = 8(r + -5)

Combine like terms: 8r + 6r = 14r
2 + 14r = 8(r + -5)

Reorder the terms:
2 + 14r = 8(-5 + r)
2 + 14r = (-5 * 8 + r * 8)
2 + 14r = (-40 + 8r)

Solving
2 + 14r = -40 + 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.
2 + 14r + -8r = -40 + 8r + -8r

Combine like terms: 14r + -8r = 6r
2 + 6r = -40 + 8r + -8r

Combine like terms: 8r + -8r = 0
2 + 6r = -40 + 0
2 + 6r = -40

Add '-2' to each side of the equation.
2 + -2 + 6r = -40 + -2

Combine like terms: 2 + -2 = 0
0 + 6r = -40 + -2
6r = -40 + -2

Combine like terms: -40 + -2 = -42
6r = -42

Divide each side by '6'.
r = -7

Simplifying
r = -7

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