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

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


Simplifying
-1r + 9(r + -5) + 4(3r + 4) = r + -5

Reorder the terms:
-1r + 9(-5 + r) + 4(3r + 4) = r + -5
-1r + (-5 * 9 + r * 9) + 4(3r + 4) = r + -5
-1r + (-45 + 9r) + 4(3r + 4) = r + -5

Reorder the terms:
-1r + -45 + 9r + 4(4 + 3r) = r + -5
-1r + -45 + 9r + (4 * 4 + 3r * 4) = r + -5
-1r + -45 + 9r + (16 + 12r) = r + -5

Reorder the terms:
-45 + 16 + -1r + 9r + 12r = r + -5

Combine like terms: -45 + 16 = -29
-29 + -1r + 9r + 12r = r + -5

Combine like terms: -1r + 9r = 8r
-29 + 8r + 12r = r + -5

Combine like terms: 8r + 12r = 20r
-29 + 20r = r + -5

Reorder the terms:
-29 + 20r = -5 + r

Solving
-29 + 20r = -5 + r

Solving for variable 'r'.

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

Add '-1r' to each side of the equation.
-29 + 20r + -1r = -5 + r + -1r

Combine like terms: 20r + -1r = 19r
-29 + 19r = -5 + r + -1r

Combine like terms: r + -1r = 0
-29 + 19r = -5 + 0
-29 + 19r = -5

Add '29' to each side of the equation.
-29 + 29 + 19r = -5 + 29

Combine like terms: -29 + 29 = 0
0 + 19r = -5 + 29
19r = -5 + 29

Combine like terms: -5 + 29 = 24
19r = 24

Divide each side by '19'.
r = 1.263157895

Simplifying
r = 1.263157895

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