Răspunsuri

2014-09-19T14:26:20+03:00

(3·x-5):4+(275-2·30):5=53

(3·x-5):4+(275-60):5=53

(3·x-5):4+215:5=53

(3·x-5):4+43=53

(3·x-5):4=53-43

(3·x-5):4=10

(3·x-5)=10·4

3·x-5=40

3·x=40+5

3·x=45

x=45:3

x=15

                                 SPER CA TE-AM AJUTAT!!!!!!!!!!!!!!!!!!!!!!!!!!!


13 4 13
2014-09-19T14:33:11+03:00
(3*x-5):4+(275-2*30):5=53
(3x-5):4+(275-60):5=53
(3x-5):4+215:5=53
(3x-5):4+43=53
(3x-5):4=53-43
(3x-5):4=10
3x-5=10*4
3x-5=40
3x=40+5
3x=45
x=15
2 5 2