Question

afla nr necunoscut
a) x+21×100=45237
b) z-57×1000+2324=530×100
c) 420×10+y-143=4105

a=? b=? c=?

Pleaseee help me dau coroana +follow la el/ea❤

Answer 1

a)
x + 21 × 100 = 45 237
x + 2 100 = 45 237
x = 45 237 - 2 100
x = 43 137


b)
z - 57 × 1 000 + 2 324 = 530 × 100
z - 57 000 + 2 324 = 53 000
z - 57 000 = 53 000 - 2 324
z - 57 000 = 50 676
z = 50 676 + 57 000
z = 107 676


c)
420 × 10 + y - 143 = 4 105
4 200 + y = 4 105 + 143
4 200 + y = 4 248
y = 4 248 - 4 200
y = 48

Answer 2

a) x+21×100=45237
x+2100=45237
x=45237-2100
x=43137

b) z-57×1000+2324=530×100
z-57×1000+2324=53000
z-57000+2324=53000
z-57000=53000-2324
z-57000=50676
z=50676+57000
z=107676

c) 420×10+y-143=4105
4200+y-143=4105
4200+y=4105+143
4200+y=4248
y=4248-4200
y=48