Practice Problems

Solve for x

\(\textbf{1)}\) \(0.45x+3=3.9\)

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The answer is \(x=2\)

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\(\,\,\,\,\,0.45x+3=3.9\)
\(\,\,\,\,\,100 \times \left(0.45x+3\right)=\left(3.9\right) \times 100\)
\(\,\,\,\,\,45x+300=390\)
\(\,\,\,\,\,45x=90\)
\(\,\,\,\,\,x=2\)

 

\(\textbf{2)}\) \(0.5x+18=22.5\)

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The answer is \(x=9\)

 

\(\textbf{3)}\) \(43.5+0.2x=51.1\)

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The answer is \(x=38\)

 

\(\textbf{4)}\) \(15.35+2x=16.55\)

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The answer is \(x=0.6\)

 

\(\textbf{5)}\) \(8+.02x=10\)

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The answer is \(x=100\)

 

\(\textbf{6)}\) \(-3.5x=7\)

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The answer is \(x=-2\)

 

See Related Pages

\(\bullet\text{ Equation Calculator (Symbolab.com)}\)
\(\,\,\,\,\,\,\,\,\)

\(\bullet\text{ Solving Equations by Addition and Subtraction}\)
\(\,\,\,\,\,\,\,\,x+3=4…\)

\(\bullet\text{ Solving Equations by Multiplication and Division}\)
\(\,\,\,\,\,\,\,\,8x=48…\)

\(\bullet\text{ Solving Multi-step Equations}\)
\(\,\,\,\,\,\,\,\,3x+2=14…\)

\(\bullet\text{ Solving Equations with Variables on Both Sides}\)
\(\,\,\,\,\,\,\,\,3x+5=7x-3…\)

\(\bullet\text{ Solving Equations with Decimals}\)
\(\,\,\,\,\,\,\,\,43.5+0.2x=51.1…\)

\(\bullet\text{ Solving Equations with Fractions}\)
\(\,\,\,\,\,\,\,\,\frac{2}{5}x+\frac{2}{3}=\frac{8}{3}…\)