-5(2r+4)=3(2r+9)+4r-7

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Solution for -5(2r+4)=3(2r+9)+4r-7 equation:


Simplifying
-5(2r + 4) = 3(2r + 9) + 4r + -7

Reorder the terms:
-5(4 + 2r) = 3(2r + 9) + 4r + -7
(4 * -5 + 2r * -5) = 3(2r + 9) + 4r + -7
(-20 + -10r) = 3(2r + 9) + 4r + -7

Reorder the terms:
-20 + -10r = 3(9 + 2r) + 4r + -7
-20 + -10r = (9 * 3 + 2r * 3) + 4r + -7
-20 + -10r = (27 + 6r) + 4r + -7

Reorder the terms:
-20 + -10r = 27 + -7 + 6r + 4r

Combine like terms: 27 + -7 = 20
-20 + -10r = 20 + 6r + 4r

Combine like terms: 6r + 4r = 10r
-20 + -10r = 20 + 10r

Solving
-20 + -10r = 20 + 10r

Solving for variable 'r'.

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

Add '-10r' to each side of the equation.
-20 + -10r + -10r = 20 + 10r + -10r

Combine like terms: -10r + -10r = -20r
-20 + -20r = 20 + 10r + -10r

Combine like terms: 10r + -10r = 0
-20 + -20r = 20 + 0
-20 + -20r = 20

Add '20' to each side of the equation.
-20 + 20 + -20r = 20 + 20

Combine like terms: -20 + 20 = 0
0 + -20r = 20 + 20
-20r = 20 + 20

Combine like terms: 20 + 20 = 40
-20r = 40

Divide each side by '-20'.
r = -2

Simplifying
r = -2

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