42r-2(13-55r)+7=8

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Solution for 42r-2(13-55r)+7=8 equation:


Simplifying
42r + -2(13 + -55r) + 7 = 8
42r + (13 * -2 + -55r * -2) + 7 = 8
42r + (-26 + 110r) + 7 = 8

Reorder the terms:
-26 + 7 + 42r + 110r = 8

Combine like terms: -26 + 7 = -19
-19 + 42r + 110r = 8

Combine like terms: 42r + 110r = 152r
-19 + 152r = 8

Solving
-19 + 152r = 8

Solving for variable 'r'.

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

Add '19' to each side of the equation.
-19 + 19 + 152r = 8 + 19

Combine like terms: -19 + 19 = 0
0 + 152r = 8 + 19
152r = 8 + 19

Combine like terms: 8 + 19 = 27
152r = 27

Divide each side by '152'.
r = 0.1776315789

Simplifying
r = 0.1776315789

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