7.4-9-2r=18

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Solution for 7.4-9-2r=18 equation:


Simplifying
7.4 + -9 + -2r = 18

Combine like terms: 7.4 + -9 = -1.6
-1.6 + -2r = 18

Solving
-1.6 + -2r = 18

Solving for variable 'r'.

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

Add '1.6' to each side of the equation.
-1.6 + 1.6 + -2r = 18 + 1.6

Combine like terms: -1.6 + 1.6 = 0.0
0.0 + -2r = 18 + 1.6
-2r = 18 + 1.6

Combine like terms: 18 + 1.6 = 19.6
-2r = 19.6

Divide each side by '-2'.
r = -9.8

Simplifying
r = -9.8

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