-7(7-3r)=-r+39

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Solution for -7(7-3r)=-r+39 equation:


Simplifying
-7(7 + -3r) = -1r + 39
(7 * -7 + -3r * -7) = -1r + 39
(-49 + 21r) = -1r + 39

Reorder the terms:
-49 + 21r = 39 + -1r

Solving
-49 + 21r = 39 + -1r

Solving for variable 'r'.

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

Add 'r' to each side of the equation.
-49 + 21r + r = 39 + -1r + r

Combine like terms: 21r + r = 22r
-49 + 22r = 39 + -1r + r

Combine like terms: -1r + r = 0
-49 + 22r = 39 + 0
-49 + 22r = 39

Add '49' to each side of the equation.
-49 + 49 + 22r = 39 + 49

Combine like terms: -49 + 49 = 0
0 + 22r = 39 + 49
22r = 39 + 49

Combine like terms: 39 + 49 = 88
22r = 88

Divide each side by '22'.
r = 4

Simplifying
r = 4

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