Question

calculati:x+102=756,x+27=1001,x-213=405,25x=875,31×x=961,2 (x+1)=16,x:19=6,451:x=41,2x-1=9,3x-2=7,7x-3=4,5x+1=16​

Answer 1

Răspuns:

Explicație pas cu pas:

x + 102 = 756

x = 756 - 102

x = 654

____________

x + 27 = 1 001                   x + 27 = 101

x = 1 001 - 27                     x = 101 - 27

x = 974                              x = 74

____________

x - 213 = 405

x = 405 + 213

x = 618

_____________

25 x = 875

x = 875 : 25

x = 35

_____________

31 × x = 961

x = 961 : 31

x = 31

____________

2(x+1) = 16

x + 1 = 16 : 2

x + 1 = 8

x = 8 - 1

x = 7

_________

x : 19 = 6

x = 6 × 19

x = 114

_____________

451 : x = 41

x = 451 : 41

x = 11

_________

2 x - 1 = 9

2 x = 9 + 1

x = 10 : 2

x = 5

___________

3 x - 2 = 7

3 x = 7 + 2

x = 9 : 3

x = 3

____________

7 x - 3 = 4

7 x = 4 + 3

7 x = 7

x = 7 : 7

x = 1

__________

5 x + 1 = 16

5 x = 16 - 1

x = 15 : 5

x = 3