👤
Miss1111
a fost răspuns

ex 28, 29
va rog repede
help
dau coroana
please

Ex 28 29 Va Rog Repedehelpdau Coroanaplease class=

Răspuns :

Dellyutzad
28 a) x+7×3=29
x+21=29
x=8
b) x-123+7×5=137
x-123+35=137
x-123=102
x=225
c) x-7×2+17=4
x-14+17=4
x+3=4
x=1
d) 47-x+7×7=7×2+4
47-x+49=14+4
x+2=18
x=16
29) x+2x+3x+...+100x=50500
101x×100÷2=50500
101x×50=50500
5050x=50500
x=10

Alte intrebari