(4r-7)-(3r+12)=0

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Solution for (4r-7)-(3r+12)=0 equation:


Simplifying
(4r + -7) + -1(3r + 12) = 0

Reorder the terms:
(-7 + 4r) + -1(3r + 12) = 0

Remove parenthesis around (-7 + 4r)
-7 + 4r + -1(3r + 12) = 0

Reorder the terms:
-7 + 4r + -1(12 + 3r) = 0
-7 + 4r + (12 * -1 + 3r * -1) = 0
-7 + 4r + (-12 + -3r) = 0

Reorder the terms:
-7 + -12 + 4r + -3r = 0

Combine like terms: -7 + -12 = -19
-19 + 4r + -3r = 0

Combine like terms: 4r + -3r = 1r
-19 + 1r = 0

Solving
-19 + 1r = 0

Solving for variable 'r'.

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

Add '19' to each side of the equation.
-19 + 19 + 1r = 0 + 19

Combine like terms: -19 + 19 = 0
0 + 1r = 0 + 19
1r = 0 + 19

Combine like terms: 0 + 19 = 19
1r = 19

Divide each side by '1'.
r = 19

Simplifying
r = 19

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