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a+9*18=875 17*28+b=2000 c-384:3=219


135*7-d=23*12

Răspuns :

Mihaelap

a + 9 * 18 = 875

a = 875 - 162

a = 713

17 * 28 + b = 2000

b = 2000 - 476

b = 1524

c - 384 : 3 = 219

c = 219 + 128

c = 347

135 * 7 - d = 23 * 12

945 - d = 276

- d = 276 - 945

d = 669

AnneMary10
a+9×18=875
a+162=875
a=875-162
a=713

17×28+b=2000
476+b=2000
b=2000-476
b=1524

c-384÷3=219
c-128=219
c=219+128
c=347

135×7-d=23×12
945-d=276
d=945-276
d=669