-3r-28=-42-r

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Solution for -3r-28=-42-r equation:


Simplifying
-3r + -28 = -42 + -1r

Reorder the terms:
-28 + -3r = -42 + -1r

Solving
-28 + -3r = -42 + -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.
-28 + -3r + r = -42 + -1r + r

Combine like terms: -3r + r = -2r
-28 + -2r = -42 + -1r + r

Combine like terms: -1r + r = 0
-28 + -2r = -42 + 0
-28 + -2r = -42

Add '28' to each side of the equation.
-28 + 28 + -2r = -42 + 28

Combine like terms: -28 + 28 = 0
0 + -2r = -42 + 28
-2r = -42 + 28

Combine like terms: -42 + 28 = -14
-2r = -14

Divide each side by '-2'.
r = 7

Simplifying
r = 7

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