(3r-4)-(7r+6)=4r

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Solution for (3r-4)-(7r+6)=4r equation:


Simplifying
(3r + -4) + -1(7r + 6) = 4r

Reorder the terms:
(-4 + 3r) + -1(7r + 6) = 4r

Remove parenthesis around (-4 + 3r)
-4 + 3r + -1(7r + 6) = 4r

Reorder the terms:
-4 + 3r + -1(6 + 7r) = 4r
-4 + 3r + (6 * -1 + 7r * -1) = 4r
-4 + 3r + (-6 + -7r) = 4r

Reorder the terms:
-4 + -6 + 3r + -7r = 4r

Combine like terms: -4 + -6 = -10
-10 + 3r + -7r = 4r

Combine like terms: 3r + -7r = -4r
-10 + -4r = 4r

Solving
-10 + -4r = 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.
-10 + -4r + -4r = 4r + -4r

Combine like terms: -4r + -4r = -8r
-10 + -8r = 4r + -4r

Combine like terms: 4r + -4r = 0
-10 + -8r = 0

Add '10' to each side of the equation.
-10 + 10 + -8r = 0 + 10

Combine like terms: -10 + 10 = 0
0 + -8r = 0 + 10
-8r = 0 + 10

Combine like terms: 0 + 10 = 10
-8r = 10

Divide each side by '-8'.
r = -1.25

Simplifying
r = -1.25

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