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

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


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

Reorder the terms:
3(-7 + r) = 5(3 + r)
(-7 * 3 + r * 3) = 5(3 + r)
(-21 + 3r) = 5(3 + r)
-21 + 3r = (3 * 5 + r * 5)
-21 + 3r = (15 + 5r)

Solving
-21 + 3r = 15 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
-21 + 3r + -5r = 15 + 5r + -5r

Combine like terms: 3r + -5r = -2r
-21 + -2r = 15 + 5r + -5r

Combine like terms: 5r + -5r = 0
-21 + -2r = 15 + 0
-21 + -2r = 15

Add '21' to each side of the equation.
-21 + 21 + -2r = 15 + 21

Combine like terms: -21 + 21 = 0
0 + -2r = 15 + 21
-2r = 15 + 21

Combine like terms: 15 + 21 = 36
-2r = 36

Divide each side by '-2'.
r = -18

Simplifying
r = -18

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