3(5+7r)-3(10r-10)=-5-10r+2r

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Solution for 3(5+7r)-3(10r-10)=-5-10r+2r equation:


Simplifying
3(5 + 7r) + -3(10r + -10) = -5 + -10r + 2r
(5 * 3 + 7r * 3) + -3(10r + -10) = -5 + -10r + 2r
(15 + 21r) + -3(10r + -10) = -5 + -10r + 2r

Reorder the terms:
15 + 21r + -3(-10 + 10r) = -5 + -10r + 2r
15 + 21r + (-10 * -3 + 10r * -3) = -5 + -10r + 2r
15 + 21r + (30 + -30r) = -5 + -10r + 2r

Reorder the terms:
15 + 30 + 21r + -30r = -5 + -10r + 2r

Combine like terms: 15 + 30 = 45
45 + 21r + -30r = -5 + -10r + 2r

Combine like terms: 21r + -30r = -9r
45 + -9r = -5 + -10r + 2r

Combine like terms: -10r + 2r = -8r
45 + -9r = -5 + -8r

Solving
45 + -9r = -5 + -8r

Solving for variable 'r'.

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

Add '8r' to each side of the equation.
45 + -9r + 8r = -5 + -8r + 8r

Combine like terms: -9r + 8r = -1r
45 + -1r = -5 + -8r + 8r

Combine like terms: -8r + 8r = 0
45 + -1r = -5 + 0
45 + -1r = -5

Add '-45' to each side of the equation.
45 + -45 + -1r = -5 + -45

Combine like terms: 45 + -45 = 0
0 + -1r = -5 + -45
-1r = -5 + -45

Combine like terms: -5 + -45 = -50
-1r = -50

Divide each side by '-1'.
r = 50

Simplifying
r = 50

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