0.75(2r-4)=0.2(36-r)

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Solution for 0.75(2r-4)=0.2(36-r) equation:


Simplifying
0.75(2r + -4) = 0.2(36 + -1r)

Reorder the terms:
0.75(-4 + 2r) = 0.2(36 + -1r)
(-4 * 0.75 + 2r * 0.75) = 0.2(36 + -1r)
(-3 + 1.5r) = 0.2(36 + -1r)
-3 + 1.5r = (36 * 0.2 + -1r * 0.2)
-3 + 1.5r = (7.2 + -0.2r)

Solving
-3 + 1.5r = 7.2 + -0.2r

Solving for variable 'r'.

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

Add '0.2r' to each side of the equation.
-3 + 1.5r + 0.2r = 7.2 + -0.2r + 0.2r

Combine like terms: 1.5r + 0.2r = 1.7r
-3 + 1.7r = 7.2 + -0.2r + 0.2r

Combine like terms: -0.2r + 0.2r = 0.0
-3 + 1.7r = 7.2 + 0.0
-3 + 1.7r = 7.2

Add '3' to each side of the equation.
-3 + 3 + 1.7r = 7.2 + 3

Combine like terms: -3 + 3 = 0
0 + 1.7r = 7.2 + 3
1.7r = 7.2 + 3

Combine like terms: 7.2 + 3 = 10.2
1.7r = 10.2

Divide each side by '1.7'.
r = 6

Simplifying
r = 6

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