Question

if 2x+y=12 and 3x+y=3, find the value of x​

Answer 1

Answer:

2x+y=12

3x+y=3

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-. -. -

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-X=9

X=-9

Answer 2

Answer:

x= −9 and y = 30

Step-by-step explanation:

Let's solve your system by substitution.

2x+y=12 and 3x+y=3

Rewrite equations:

2x+y=12;3x+y=3

Step: Solve2x+y=12for y:

2x+y=12

2x+y+−2x=12+−2x(Add -2x to both sides)

y=−2x+12

Step: Substitute−2x+12foryin3x+y=3:

3x+y=3

3x+−2x+12=3

x+12=3(Simplify both sides of the equation)

x+12+−12=3+−12(Add -12 to both sides)

x=−9

Step: Substitute−9forxiny=−2x+12:

y=−2x+12

y=(−2)(−9)+12

y=30