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lorasvet [3.4K]
2 years ago
15

2.3+0.02(x+20)-4.8=-9 Solve for x

Mathematics
1 answer:
Naya [18.7K]2 years ago
5 0

Answer:

x=-345

Step-by-step explanation:

2.3+0.02\left(x+20\right)-4.8=-9

\mathrm{Multiply\:both\:sides\:by\:}100

2.3\cdot \:100+0.02\left(x+20\right)\cdot \:100-4.8\cdot \:100=-9\cdot \:100

230+2\left(x+20\right)-480=-900

\mathrm{Subtract\:}230-480\mathrm{\:from\:both\:sides}

230+2\left(x+20\right)-480-\left(230-480\right)=-900-\left(230-480\right)

2\left(x+20\right)=-650

\mathrm{Divide\:both\:sides\:by\:}2

\frac{2\left(x+20\right)}{2}=\frac{-650}{2}

x+20=-325

\mathrm{Subtract\:}20\mathrm{\:from\:both\:sides}

x+20-20=-325-20

\bold{x=-345}

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