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pychu [463]
3 years ago
11

What is the value of y in the equation 5x + 2y = 20, when x = 0.3?

Mathematics
2 answers:
garik1379 [7]3 years ago
8 0
Y=9.25 because 5x0.3=1.5 you move constents to the right hand side and it becomes -1.5 then you do the rest and the answers is 9.25
Pepsi [2]3 years ago
5 0

Hi there! Hopefully this helps!

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

5(0.3) + 2y = 20

<h2>Answer: Y = 9.25.</h2><h2>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</h2><h2 />

| 5(0.3) + 2y = 20

| Multiply 5 and 0.3 to get 1.5

\/

1.5 + 2y = 20

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We <em>subtract 1.5</em> from <u>both sides</u>.

2y = 20 - 1.5

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtract 1.5 from 20 to get 18.5.

2y = 18.5

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Divide both sides by 2.

y = \frac{18.5}{2}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Expand \frac{18.5}{2} = 9.25 by multiplying both numerator and the denominator by 10.

y =\frac{185}{20}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Reduce the fraction \frac{185}{20} = 9.25 to lowest terms by <u>extracting and canceling</u> out 5.

y =\frac{37}{4}.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

\frac{37}{4} = 9.25 in decimal form.

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