7-3r=r-4(2-r)

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Solution for 7-3r=r-4(2-r) equation:


Simplifying
7 + -3r = r + -4(2 + -1r)
7 + -3r = r + (2 * -4 + -1r * -4)
7 + -3r = r + (-8 + 4r)

Reorder the terms:
7 + -3r = -8 + r + 4r

Combine like terms: r + 4r = 5r
7 + -3r = -8 + 5r

Solving
7 + -3r = -8 + 5r

Solving for variable 'r'.

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

Add '-5r' to each side of the equation.
7 + -3r + -5r = -8 + 5r + -5r

Combine like terms: -3r + -5r = -8r
7 + -8r = -8 + 5r + -5r

Combine like terms: 5r + -5r = 0
7 + -8r = -8 + 0
7 + -8r = -8

Add '-7' to each side of the equation.
7 + -7 + -8r = -8 + -7

Combine like terms: 7 + -7 = 0
0 + -8r = -8 + -7
-8r = -8 + -7

Combine like terms: -8 + -7 = -15
-8r = -15

Divide each side by '-8'.
r = 1.875

Simplifying
r = 1.875

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