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Aflati trei solutii ale ecuatiei: a) x+ y=6; b)x 2y=5; c)3x-y=2; d)3x+2y=10.

Răspuns :

a)x+y=6
x+y+−y=6+y
x=−y+6
b)x^2y=5
x^2y/y=5/y
x^2=5/y
x=5/y or x=5/y
c)3x-y=2
3x−y+y=2+y
3x=y+2
3x/3=y+2/3
x=1/3y+2/3
d)3x+2y=10
3x+2y+2y=10+2y
3x=−2y+10
3x/3=2y+10/3
x=−2/3y+10/3