Respuesta :

3x + 2y = 4
2x - y = 5 times second equation by 2
4x-2y=10
adding equation 1 and new equation
7x=14
x=2
put in eq 1
3(2)+2y=4

6+2y=4
2y=-2
y=-1
option b is right 

we have

[tex]3x+2y=4[/tex] ----> equation A

[tex]2x-y=5[/tex] ----> equation B

Multiply the equation B by [tex]2[/tex]

[tex]2(2x-y)=2*5[/tex]

[tex]4x-2y=10[/tex] ------> equation C

Adds equation A and equation C

[tex]3x+2y=4 \\4x-2y=10\\---------- \\4x+3x=4+10 \\7x=14 \\x=2[/tex]

find the value of y

[tex]2*2-y=5[/tex]

[tex]y=4-5=-1[/tex]

the solution is the point [tex](2,-1)[/tex]

therefore

the answer is the option B

has one solution

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