2(-4+7r)=90

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Solution for 2(-4+7r)=90 equation: 


Simplifying
2(-4 + 7r) = 90
(-4 * 2 + 7r * 2) = 90
(-8 + 14r) = 90

Solving
-8 + 14r = 90

Solving for variable 'r'.

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

Add '8' to each side of the equation.
-8 + 8 + 14r = 90 + 8

Combine like terms: -8 + 8 = 0
0 + 14r = 90 + 8
14r = 90 + 8

Combine like terms: 90 + 8 = 98
14r = 98

Divide each side by '14'.
r = 7

Simplifying
r = 7

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