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
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