Answer:
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Step-by-step explanation:
[tex]\left \{ {{-x+y=3.5 ---1} \atop {x+3y=9.5---2}} \right.[/tex]
(1+2)
4y=13
y=13/4
The value of y is 1.5
"It is a set of equations for which we find the common solution."
"It is a mathematical statement which consists of equal symbol between two mathematical expressions."
For given question,
We have been given a system of equations.
-x + y = -3.5 ................(1)
x + 3y = 9.5 ..................(2)
From equation (1),
y = -3.5 + x ...................(3)
Substitute above value of y in equation (2),
⇒ x + 3( -3.5 + x) = 9.5
⇒ x - 10.5 + 3x = 9.5
⇒ 4x - 10.5 = 9.5
⇒ 4x = 9.5 + 10.5
⇒ 4x = 20
⇒ x = 5
Substitute the above value x in equation (3),
⇒ y = -3.5 + 5
⇒ y = 1.5
Therefore, the value of y is 1.5
Learn more about the system of equations here:
https://brainly.com/question/12895249
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