Răspuns :
a+3x4=b
b-5÷9=15
a+3x4-5÷9=15
D-am la o parte termenii necunoscuti:
3x4=12 / b (12-b=a)
Adica:
(12-b)+3x4=12 (fara b)+3x4
=12+12
=24
24 /B
b-5÷9=15
a+3x4-5÷9=15
D-am la o parte termenii necunoscuti:
3x4=12 / b (12-b=a)
Adica:
(12-b)+3x4=12 (fara b)+3x4
=12+12
=24
24 /B
[(a:2 +3) x 4]-5 :9=15
(2a+12)-5=15 x 9
(2a+12)-5=135
2a+12=135-5
2a=130-12
a=118:2
a=59
(2a+12)-5=15 x 9
(2a+12)-5=135
2a+12=135-5
2a=130-12
a=118:2
a=59