Question

va rog ex 2,3,4,5 dau 50 de puncte și coroana

Answer 1

2.

a) x +2174 = 5074

x =5074 - 2174 = 2900

b) x - 1079 = 32105

x = 32105 + 1079

x = 33184

c)19703 - x = 8347

19703 - 8347 = x

x = 11356

d) 2173 + x + 11437 = 25719

x = 25719 - 11437 -2173

x = 12109

e) 210 +147 = x +319

357 -319 = x

x = 38

f) 1973 + (x-73) =2135

x = 2135 - 1973 +73

x = 235

3.

a) 3725-1968-437+x =x+1320

1320 +x = x+1320

b)

12375 -10371 -4375+x =x -2371

x-2371 =x -2371

c) 1000 - x =1000

x =0

4.

x+13≤17; x≤17-13;  x≤4   deci x∈{0,2,3}

b) 370≥x +371

370 - 371 ≥x

-1 ≥ x   deci x≤-1 deci x ∉{0,2,3,7}

c)

x-7≤572-568

x-7≤4,     x≤4+7

x≤11,  x∈{0,2,3,7}

d)

15<x+14≤20

15-14<x≤20-14

1|<x≤6

x∈{0,2,3}

e)

x≥730-724

x≥6, x∈{7}

f)

x≥237-154-136

x≥-53

x∈{0,2,3,7}