9-4r-7=0

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Solution for 9-4r-7=0 equation: 


Simplifying
9 + -4r + -7 = 0

Reorder the terms:
9 + -7 + -4r = 0

Combine like terms: 9 + -7 = 2
2 + -4r = 0

Solving
2 + -4r = 0

Solving for variable 'r'.

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

Add '-2' to each side of the equation.
2 + -2 + -4r = 0 + -2

Combine like terms: 2 + -2 = 0
0 + -4r = 0 + -2
-4r = 0 + -2

Combine like terms: 0 + -2 = -2
-4r = -2

Divide each side by '-4'.
r = 0.5

Simplifying
r = 0.5

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