Մաթեմատիկա տնային և դասարանական
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Ա.7+x=7+0=7
Բ.7+x=7+3=10
Գ.7+x=7+(-1)=6
Դ.7+x=7+(-4)=3
Զ.7+x=7+(-10)=-3
Ե.7+x=7+(-7)=0
![](https://koryun.gaboyan.am/wp-content/uploads/2021/09/image-29.png)
2x+1=10+1=11
6+8x=6+(-8)=-2
5-4a=5-8=-3
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a+b=1+3=4
a-b=(-2)-4=-6
![](https://koryun.gaboyan.am/wp-content/uploads/2021/09/image-31.png)
a*b=3/4*8/5=24/20=6/5=6/5
2(a+b)=2(3/10+1 1/2)=2(3/10+3/2)=2(3/10+15/10)=2(18/10)=2×18/10=18/5=3 3/5
![](https://koryun.gaboyan.am/wp-content/uploads/2021/09/image-32.png)
P-a+a+a+a=4a
S-axa
![](https://koryun.gaboyan.am/wp-content/uploads/2021/09/image-33.png)
(a+b)+(3-c)
(a+b)-(3-c)
(a+b)x(3-c)
(a+b):(3-c)