7(r-3)=r-36+3r

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Solution for 7(r-3)=r-36+3r equation:


Simplifying
7(r + -3) = r + -36 + 3r

Reorder the terms:
7(-3 + r) = r + -36 + 3r
(-3 * 7 + r * 7) = r + -36 + 3r
(-21 + 7r) = r + -36 + 3r

Reorder the terms:
-21 + 7r = -36 + r + 3r

Combine like terms: r + 3r = 4r
-21 + 7r = -36 + 4r

Solving
-21 + 7r = -36 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
-21 + 7r + -4r = -36 + 4r + -4r

Combine like terms: 7r + -4r = 3r
-21 + 3r = -36 + 4r + -4r

Combine like terms: 4r + -4r = 0
-21 + 3r = -36 + 0
-21 + 3r = -36

Add '21' to each side of the equation.
-21 + 21 + 3r = -36 + 21

Combine like terms: -21 + 21 = 0
0 + 3r = -36 + 21
3r = -36 + 21

Combine like terms: -36 + 21 = -15
3r = -15

Divide each side by '3'.
r = -5

Simplifying
r = -5

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