15r-10-(-r)+5r+3=

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Solution for 15r-10-(-r)+5r+3= equation:


Simplifying
15r + -10 + -1(-1r) + 5r + 3 = 0

Remove parenthesis around (-1r)
15r + -10 + -1 * -1r + 5r + 3 = 0

Multiply -1 * -1
15r + -10 + 1r + 5r + 3 = 0

Reorder the terms:
-10 + 3 + 15r + 1r + 5r = 0

Combine like terms: -10 + 3 = -7
-7 + 15r + 1r + 5r = 0

Combine like terms: 15r + 1r = 16r
-7 + 16r + 5r = 0

Combine like terms: 16r + 5r = 21r
-7 + 21r = 0

Solving
-7 + 21r = 0

Solving for variable 'r'.

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

Add '7' to each side of the equation.
-7 + 7 + 21r = 0 + 7

Combine like terms: -7 + 7 = 0
0 + 21r = 0 + 7
21r = 0 + 7

Combine like terms: 0 + 7 = 7
21r = 7

Divide each side by '21'.
r = 0.3333333333

Simplifying
r = 0.3333333333

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