-4(-5r+3)-3(6r+3)=r-5-4

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Solution for -4(-5r+3)-3(6r+3)=r-5-4 equation:


Simplifying
-4(-5r + 3) + -3(6r + 3) = r + -5 + -4

Reorder the terms:
-4(3 + -5r) + -3(6r + 3) = r + -5 + -4
(3 * -4 + -5r * -4) + -3(6r + 3) = r + -5 + -4
(-12 + 20r) + -3(6r + 3) = r + -5 + -4

Reorder the terms:
-12 + 20r + -3(3 + 6r) = r + -5 + -4
-12 + 20r + (3 * -3 + 6r * -3) = r + -5 + -4
-12 + 20r + (-9 + -18r) = r + -5 + -4

Reorder the terms:
-12 + -9 + 20r + -18r = r + -5 + -4

Combine like terms: -12 + -9 = -21
-21 + 20r + -18r = r + -5 + -4

Combine like terms: 20r + -18r = 2r
-21 + 2r = r + -5 + -4

Reorder the terms:
-21 + 2r = -5 + -4 + r

Combine like terms: -5 + -4 = -9
-21 + 2r = -9 + r

Solving
-21 + 2r = -9 + 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.
-21 + 2r + -1r = -9 + r + -1r

Combine like terms: 2r + -1r = 1r
-21 + 1r = -9 + r + -1r

Combine like terms: r + -1r = 0
-21 + 1r = -9 + 0
-21 + 1r = -9

Add '21' to each side of the equation.
-21 + 21 + 1r = -9 + 21

Combine like terms: -21 + 21 = 0
0 + 1r = -9 + 21
1r = -9 + 21

Combine like terms: -9 + 21 = 12
1r = 12

Divide each side by '1'.
r = 12

Simplifying
r = 12

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