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Exercise

$y=\frac{1}{3}x-5;\:x=21$

Step-by-step Solution

1

Calculate the numerical value for $y=\frac{1}{3}x-5$ when $x=21$. Replace the unknowns with their corresponding values

$y=21\left(\frac{1}{3}\right)-5$
2

Multiply the fraction and term in $21\left(\frac{1}{3}\right)$

$y=\frac{21\cdot 1}{3}-5$
3

Multiply $21$ times $1$

$y=\frac{21}{3}-5$
4

Divide $21$ by $3$

$y=7-5$
5

Subtract the values $7$ and $-5$

$y=2$

Final answer to the exercise

$y=2$

Try other ways to solve this exercise

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  • Integrate by partial fractions
  • Product of Binomials with Common Term
  • FOIL Method
  • Integrate by substitution
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  • Integrate using tabular integration
  • Integrate by trigonometric substitution
  • Weierstrass Substitution
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Main Topic: Numerical value of an algebraic expression

The numerical value of an algebraic expression is the result obtained by substituting the variables by a numerical value given.

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