4r-21=-48+7r

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Solution for 4r-21=-48+7r equation:


Simplifying
4r + -21 = -48 + 7r

Reorder the terms:
-21 + 4r = -48 + 7r

Solving
-21 + 4r = -48 + 7r

Solving for variable 'r'.

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

Add '-7r' to each side of the equation.
-21 + 4r + -7r = -48 + 7r + -7r

Combine like terms: 4r + -7r = -3r
-21 + -3r = -48 + 7r + -7r

Combine like terms: 7r + -7r = 0
-21 + -3r = -48 + 0
-21 + -3r = -48

Add '21' to each side of the equation.
-21 + 21 + -3r = -48 + 21

Combine like terms: -21 + 21 = 0
0 + -3r = -48 + 21
-3r = -48 + 21

Combine like terms: -48 + 21 = -27
-3r = -27

Divide each side by '-3'.
r = 9

Simplifying
r = 9

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