3r+5(2r+7)-7r=4

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Solution for 3r+5(2r+7)-7r=4 equation:


Simplifying
3r + 5(2r + 7) + -7r = 4

Reorder the terms:
3r + 5(7 + 2r) + -7r = 4
3r + (7 * 5 + 2r * 5) + -7r = 4
3r + (35 + 10r) + -7r = 4

Reorder the terms:
35 + 3r + 10r + -7r = 4

Combine like terms: 3r + 10r = 13r
35 + 13r + -7r = 4

Combine like terms: 13r + -7r = 6r
35 + 6r = 4

Solving
35 + 6r = 4

Solving for variable 'r'.

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

Add '-35' to each side of the equation.
35 + -35 + 6r = 4 + -35

Combine like terms: 35 + -35 = 0
0 + 6r = 4 + -35
6r = 4 + -35

Combine like terms: 4 + -35 = -31
6r = -31

Divide each side by '6'.
r = -5.166666667

Simplifying
r = -5.166666667

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