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

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


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

Combine like terms: -3r + -1r = -4r
7 + -4r = 4(2 + r)
7 + -4r = (2 * 4 + r * 4)
7 + -4r = (8 + 4r)

Solving
7 + -4r = 8 + 4r

Solving for variable 'r'.

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

Add '-4r' to each side of the equation.
7 + -4r + -4r = 8 + 4r + -4r

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

Combine like terms: 4r + -4r = 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 = 1
-8r = 1

Divide each side by '-8'.
r = -0.125

Simplifying
r = -0.125

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