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

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


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

Reorder the terms:
3r + 5(7 + 5r) + -7 = 4
3r + (7 * 5 + 5r * 5) + -7 = 4
3r + (35 + 25r) + -7 = 4

Reorder the terms:
35 + -7 + 3r + 25r = 4

Combine like terms: 35 + -7 = 28
28 + 3r + 25r = 4

Combine like terms: 3r + 25r = 28r
28 + 28r = 4

Solving
28 + 28r = 4

Solving for variable 'r'.

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

Add '-28' to each side of the equation.
28 + -28 + 28r = 4 + -28

Combine like terms: 28 + -28 = 0
0 + 28r = 4 + -28
28r = 4 + -28

Combine like terms: 4 + -28 = -24
28r = -24

Divide each side by '28'.
r = -0.8571428571

Simplifying
r = -0.8571428571

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