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

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


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

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

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

Combine like terms: -3r + r = -2r
7 + -3r = -8 + -2r

Solving
7 + -3r = -8 + -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.
7 + -3r + 2r = -8 + -2r + 2r

Combine like terms: -3r + 2r = -1r
7 + -1r = -8 + -2r + 2r

Combine like terms: -2r + 2r = 0
7 + -1r = -8 + 0
7 + -1r = -8

Add '-7' to each side of the equation.
7 + -7 + -1r = -8 + -7

Combine like terms: 7 + -7 = 0
0 + -1r = -8 + -7
-1r = -8 + -7

Combine like terms: -8 + -7 = -15
-1r = -15

Divide each side by '-1'.
r = 15

Simplifying
r = 15

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