Question

afla numerele necunoscute din expresiile:b)2+bx9-25=40;c).(c-104+2)x5+3=98;d).(dx4+20):4=12;f)11-(7x5-9x9:f:3):8=7;g)22-5x(38-4xg)=12;h)26+(6xh-7x3):9=27

Answer 1

b) 2+b*9=65
b*9=65-2
b*9=63
b=63:9
b=7

c) (c-104+2)*5=98-3
(c-104+2)*5=95
(c-104+2)=95:5
(c-104+2)=19
c-104=19-2
c-104=17
c=104+17
c=121

d) (d*4+20)=12*4
(d*4+20)=48
d*4=48-20
d*4=28
d=28:4
d=7