40+8r=70

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Solution for 40+8r=70 equation: 


Simplifying
40 + 8r = 70

Solving
40 + 8r = 70

Solving for variable 'r'.

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

Add '-40' to each side of the equation.
40 + -40 + 8r = 70 + -40

Combine like terms: 40 + -40 = 0
0 + 8r = 70 + -40
8r = 70 + -40

Combine like terms: 70 + -40 = 30
8r = 30

Divide each side by '8'.
r = 3.75

Simplifying
r = 3.75

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