3(r-8)-(-4)=7

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Solution for 3(r-8)-(-4)=7 equation:


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

Reorder the terms:
3(-8 + r) + -1(-4) = 7
(-8 * 3 + r * 3) + -1(-4) = 7
(-24 + 3r) + -1(-4) = 7

Multiply -1 * -4
-24 + 3r + 4 = 7

Reorder the terms:
-24 + 4 + 3r = 7

Combine like terms: -24 + 4 = -20
-20 + 3r = 7

Solving
-20 + 3r = 7

Solving for variable 'r'.

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

Add '20' to each side of the equation.
-20 + 20 + 3r = 7 + 20

Combine like terms: -20 + 20 = 0
0 + 3r = 7 + 20
3r = 7 + 20

Combine like terms: 7 + 20 = 27
3r = 27

Divide each side by '3'.
r = 9

Simplifying
r = 9

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