Question

☆Urgent☆
15 puncte

a) (875-a x 5) ÷ 24 =15

b) (a-12x35) x 10 =3690

c) (36:a+6×6) -40=2

d) Compara numerele a și z din explicatiile:

63+y • (ori) 24-13= 362
și
(z:9+9x5) x 8= 432

Answer 1

a) (875-a x 5) ÷ 24 =15
875-ax5=15x24
875-ax5=360
875-360=ax5
515=ax5
a=515:5
a=103

b) (a-12x35) x 10 =3690
a-12x35=3690:10
a-12x35=369
a-420=369
a=369+420
a=789

c) (36:a+6×6) -40=2
36:a+6x6=2+40
36:a+36=42
36:a=42-36
36:a=6
a=36:6
a=6

Answer 2

1) 875/24- a•5/24=24•15 875-a•5=360 a=515/5 a=103 2) 10a-4200=3690 10a=7890 a=789 3)36/a-4=2 36/a=6 6a=36 a=6 4) 63+11y=360 11y=297 y=297/11 y=27 8z/9+360/1=432/1 8z+3240=3888 8z=3888-3240 8z=648 z=81 y