Respuesta:
3x+2y=7
2x-3y=9
sustitucion 1 sustiitucion 2
1)3x+2y=7 2x-3y=9
3x=7-2y 2(7-2y)-3y=9
x=7-2y 3
3 2(7-2y)*3-3y*3=9*3
3
2(7-2y)-3y*3=9*3
14-4y-9y=27
-4y-9y=27-14
-13y=13
y= -13=-1
13
y=-1
aplicamos y=-1
3x+2(-1)=7
3x-2=7
3x=7+2
3x=9
x=9=3
x=3
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Verified answer
Respuesta:
3x+2y=7
2x-3y=9
sustitucion 1 sustiitucion 2
1)3x+2y=7 2x-3y=9
3x=7-2y 2(7-2y)-3y=9
x=7-2y 3
3 2(7-2y)*3-3y*3=9*3
3
2(7-2y)-3y*3=9*3
14-4y-9y=27
-4y-9y=27-14
-13y=13
y= -13=-1
13
y=-1
aplicamos y=-1
3x+2y=7
3x+2(-1)=7
3x-2=7
3x=7+2
3x=9
x=9=3
3
x=3