Question

Afla numarul necunoscut:
X:2-3=5
Y-30x7=400+3x20+5
Z-{2000:[(100:10-5)x20]}=9680

Answer 1

Răspuns

Explicație pas cu pas:

x : 2 - 3 = 5

x : 2 = 5 + 3

x : 2 = 8

x = 8 × 2

x = 16

_____________

y - 30 × 7 = 400 + 3 × 20 + 5

y - 210 = 400 + 60 + 5

y - 210 = 465

y = 465 + 210

y = 675

________________

z - { 2 000 : [ (100 : 10 - 5 ) × 20 ] } = 9 680

z - { 2 000 : [ ( 10 - 5 ) × 20 ] } = 9 680

z - [ 2 000 : ( 5 × 20 ) ] = 9 680

z - ( 2 000 : 100 ) = 9 680

z - 20 = 9 680

z = 9 680 + 20

z = 9 700

Answer 2

X:2-3=5
X:2=5+3
X:2=8
X=8×2
X=16

Y-30×7=400+3×20+5
Y-30×7=400+60+5
Y-30×7=460+5
Y-30×7=465
Y-210=465
Y=465+210
Y=675

Z-{2000:[(100:10-5)×20]}=9680
Z-{2000:[(10-5)×20]}=9680
Z-[2000:(5×20)=9680
Z-(2000:100)=9680
Z-20=9680
Z=9680+20
Z=9700