7(3r-1)-(r+5)=-52

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Solution for 7(3r-1)-(r+5)=-52 equation:


Simplifying
7(3r + -1) + -1(r + 5) = -52

Reorder the terms:
7(-1 + 3r) + -1(r + 5) = -52
(-1 * 7 + 3r * 7) + -1(r + 5) = -52
(-7 + 21r) + -1(r + 5) = -52

Reorder the terms:
-7 + 21r + -1(5 + r) = -52
-7 + 21r + (5 * -1 + r * -1) = -52
-7 + 21r + (-5 + -1r) = -52

Reorder the terms:
-7 + -5 + 21r + -1r = -52

Combine like terms: -7 + -5 = -12
-12 + 21r + -1r = -52

Combine like terms: 21r + -1r = 20r
-12 + 20r = -52

Solving
-12 + 20r = -52

Solving for variable 'r'.

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

Add '12' to each side of the equation.
-12 + 12 + 20r = -52 + 12

Combine like terms: -12 + 12 = 0
0 + 20r = -52 + 12
20r = -52 + 12

Combine like terms: -52 + 12 = -40
20r = -40

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

Simplifying
r = -2

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