1.
20:8=2.5
15:2.5=6
6
2.
14×2.5=35
3.
2.5×1.4=3.5
4.
42:3.5=12
12
5.
14:3.5=4
__________________________________________________________________________
2.
x+10
x+25+10x+35=2x+10
x+35=2x+20
x=15
___________________________________________________________________________
3.
26+13=39
39:3=13
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4.
ո-x+5
Հ-7x+5
7x+5=4(x+5)
7x+5=4x+20
3x=15
+=5
Միքայել Հակոբյան 