Question

Se dau ecuatiile :
a) 3(x-y)=2(x+y-4) si b) x+2 supra 3 - y-4 supra 5 =1 supra 2.Obtineti ecuatii echivalente de forma : ax+by=c.

Answer 1

a)3x-3y=2x+2y-8
3x-2x-3y-2y=-8
x-5y=-8       

b)(x+2)/3-(y-4)/5=1/2
(5x+10-3y+12)/15=1/2
2(5x-3y+22)=15
10x-6y+44=15
10x-6y=15-44
10x-6y=-29