-3(r+5)+(4r+2)=8

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Solution for -3(r+5)+(4r+2)=8 equation:


Simplifying
-3(r + 5) + (4r + 2) = 8

Reorder the terms:
-3(5 + r) + (4r + 2) = 8
(5 * -3 + r * -3) + (4r + 2) = 8
(-15 + -3r) + (4r + 2) = 8

Reorder the terms:
-15 + -3r + (2 + 4r) = 8

Remove parenthesis around (2 + 4r)
-15 + -3r + 2 + 4r = 8

Reorder the terms:
-15 + 2 + -3r + 4r = 8

Combine like terms: -15 + 2 = -13
-13 + -3r + 4r = 8

Combine like terms: -3r + 4r = 1r
-13 + 1r = 8

Solving
-13 + 1r = 8

Solving for variable 'r'.

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

Add '13' to each side of the equation.
-13 + 13 + 1r = 8 + 13

Combine like terms: -13 + 13 = 0
0 + 1r = 8 + 13
1r = 8 + 13

Combine like terms: 8 + 13 = 21
1r = 21

Divide each side by '1'.
r = 21

Simplifying
r = 21

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