Question

repede ambele va rog frumos​

Answer 1

Răspuns:

4. a) x=1635

b) x=287

c) x=1569

5. a=6

Explicație pas cu pas:

a) x+3487=5122 => x=5122-3487 => x=1635

b) x+522-389=420

x+522=420+389

x+522=809

x=809-522

x=287

c) 4435-x=2866

x=4435-2866

x=1569

5. x=9

a=3x+3*(2x-10)-5x

a=3*9+3*(2*9-10)-5*9

a=27+3*(18-10)-45

a=27+3*8-45

a=27+24-45

a=51-45

a=6

Answer 2

Răspuns:

a)5122-3487=x

x=1635

b)x= 420-(522-389)

x=287

c) x=4435-2866

x=1 569

5. a=3*9+3*(2*9-10)-5*9=6