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ajutatima la aceasta problema dau 5 puncte:

A) (x+20):12+68=78

B) (x+282-75):2=104

C) Xori4:10+101=133


Răspuns :

A (x+20):12+68=78

(x+20):12=78-68

(x+20):12=10

x+20=10x12

x+20=120

x=120-20

x=100

B

(x+282-75):2=184

x+282=184x2

x+282=368

x=368-282

x=86

C. x*4:10+101=133

4x/10+101=133

4x/10=133-101

4x/10=32

4x=32x10

4x=320

x=320:4

x=80

Răspuns:

Explicație pas cu pas:

A)

(x+20) : 12 = 78 - 68

(x+20) :12 = 10      ( *12)

x+20 =120

x= 100

B).

(x + 207 ) :2 =104     (*2)

x+207 = 208

x= 1

C).

4x :10= 133 -101

4x :10 =32   (*10)

4x = 320

x= 80