Question

rezolvați in mulțimea R ecuația:

a) 8x-1/5 - 1 = 50-2x/9 + 3x+3/4
b)3y+1/3 - 16-y/6 - 9y+1/7 = 3​

Answer 1

Răspuns:

a) 7; b) -46

Explicație pas cu pas:

a) 8x-1/5 - 1 = 50-2x/9 + 3x+3/4<=> 36(8x-1)-180=20(50-2x)+45(3x+3)<=>288x-36=1000-40x+135x+135<=>288x-216<=>193x=1351<=>x=1351:193<=>x=7

b) 3y+1/3 - 16-y/6 - 9y+1/7 = 3<=>14(3y+1)-7(16-y)-6(9y+1)=126<=>42y+14-112+7y-54y-6=126<=>-5y-104=126<=>-5y=126+104<=>-6y=230<=>y=230:(-5)<=>y=-46