Question

Vă rog mult vreau rezolvare la ex 1 c, 2,3,4 dau coroana vreau acum rezolvarea

Answer 1

2) a) 3,5x+3,35=20,85
3,5x = 20,85 - 3,35
3,5x = 17,5
x = 4

b) 0,8(x+0,2)=4,96
x+2=6,2
x=6,2-2
x=4,2


3) x+3/5+x+5/6+x+7/7=6
42(x+3)+35(x+6)+30(x+7)=1260
42x+126+35x+210+30x+210=1260
107x+546=1260
107x=1260-546
107x=714
x=714/107