Question

What is the answer to this equation: 7.4 - 9 - 2r =18

Answer 1

The answer to the equation is r=-9.8

First combine the like terms of the equation.

7.4-9-2r=18

7.4+(-9)=-1.6

-1.6-2r=18

Continue by adding 1.6 to both sides of the equation to isolate the variable.

-1.6-2r=18

+1.6 +1.6

-----------------

-2r=19.6

Divide -2 on both sides.

$\frac{-2r}{-2}$ = $\frac{19.6}{-2}$

r=-9.8

Answer 2

We can get the answer to this equation by solving for the variable (r).

7.4 - 9 - 2r = 18

We want to get r on one side, so we want to push everything else to the other side.

-2r = 18 - 7.4 + 9

-2r = 19.6

2r = -19.6

r = -9.8