Răspuns :
90 + 90 : x = 92
90 : x = 92 - 90
90 = 2 * x
x = 90 : 2
x = 45
35 + a : 9 = 90
a : 9 = 90 - 35
a : 9 = 55
a = 55 * 9
a = 495
90 : x = 92 - 90
90 = 2 * x
x = 90 : 2
x = 45
35 + a : 9 = 90
a : 9 = 90 - 35
a : 9 = 55
a = 55 * 9
a = 495
90 + 90 : x=92
90 : x=92 minus 90
90 :x=2
x=90 : 2
x=45
35 + a: 9=90
a :9=90 minus 35
a :9=55
a= 55 ori 9
a =495
90 : x=92 minus 90
90 :x=2
x=90 : 2
x=45
35 + a: 9=90
a :9=90 minus 35
a :9=55
a= 55 ori 9
a =495