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Tanya [424]
2 years ago
11

What is the value of x in the equation x – y = 30, when y = 15? 4 8 80 200

Mathematics
2 answers:
AVprozaik [17]2 years ago
5 0

<u>Answer:</u>

45

<u>Step-by-step explanation:</u>

We are given an equation <em>x - y = 30 </em>which we are to solve for x when the value of y is 15.

To solve this linear equation for x, we just need to substitute the given value of y into the equation to get the value of x.

x - y = 30

x - 15 = 30

x = 30 + 15

x = 45

Therefore, the value of x is 45 when y = 30.

Unfortunately this value is not in the given options but 45 is the correct answer.

yawa3891 [41]2 years ago
3 0

<em>There are many ways of solving the set of equations x + y = 30 and  x - y = 2 for x and y. </em>

<em> </em>

<em>From x +y = 30 we get x = 30 - y </em>

<em> </em>

<em>Now substitute this in the equation x - y = 2 </em>

<em> </em>

<em>30 - y - y = 2 </em>

<em> </em>

<em>-2y = -28 </em>

<em> </em>

<em>y = 14 </em>

<em> </em>

<em>As x = 30 - y = 30 - 14 = 16 </em>

<em> </em>

<em>The required solution of the set of equations is x = 16 and y = 14</em>


<em>Toodles~</em>

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