7r+4=2r+20

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Solution for 7r+4=2r+20 equation:


Simplifying
7r + 4 = 2r + 20

Reorder the terms:
4 + 7r = 2r + 20

Reorder the terms:
4 + 7r = 20 + 2r

Solving
4 + 7r = 20 + 2r

Solving for variable 'r'.

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

Add '-2r' to each side of the equation.
4 + 7r + -2r = 20 + 2r + -2r

Combine like terms: 7r + -2r = 5r
4 + 5r = 20 + 2r + -2r

Combine like terms: 2r + -2r = 0
4 + 5r = 20 + 0
4 + 5r = 20

Add '-4' to each side of the equation.
4 + -4 + 5r = 20 + -4

Combine like terms: 4 + -4 = 0
0 + 5r = 20 + -4
5r = 20 + -4

Combine like terms: 20 + -4 = 16
5r = 16

Divide each side by '5'.
r = 3.2

Simplifying
r = 3.2

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