7(3r-5)=r+5

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


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

Reorder the terms:
7(-5 + 3r) = r + 5
(-5 * 7 + 3r * 7) = r + 5
(-35 + 21r) = r + 5

Reorder the terms:
-35 + 21r = 5 + r

Solving
-35 + 21r = 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.
-35 + 21r + -1r = 5 + r + -1r

Combine like terms: 21r + -1r = 20r
-35 + 20r = 5 + r + -1r

Combine like terms: r + -1r = 0
-35 + 20r = 5 + 0
-35 + 20r = 5

Add '35' to each side of the equation.
-35 + 35 + 20r = 5 + 35

Combine like terms: -35 + 35 = 0
0 + 20r = 5 + 35
20r = 5 + 35

Combine like terms: 5 + 35 = 40
20r = 40

Divide each side by '20'.
r = 2

Simplifying
r = 2

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