solve for u. 1.8 + 0.2u = -0.1u u =

Answer:

$u=-6$

Explanation:

Step1: Add $0.1u$ to both sides

$1.8 + 0.2u+0.1u=-0.1u + 0.1u$ $1.8+0.3u = 0$

Step2: Subtract 1.8 from both sides

$1.8+0.3u-1.8=0 - 1.8$ $0.3u=-1.8$

Step3: Divide both sides by 0.3

$\frac{0.3u}{0.3}=\frac{-1.8}{0.3}$ $u=-6$