Question

dodawanie i odejmowanie sum algebraicznych a)3b+(b+1)= b)5a-(a+1)= c)2x-(3-5-x)= d)2a+(3a-2b)+(a+b)= e)5a-(2-x)+b-2x+5= f)7k-(m-2n+k)-(5k-3)= g)0,3x-(5+0,7y)-(0,9-0,1x)+(x-0,1)=

Answer 1

a)3b+(b+1)=3b+b+1 = 4b+1

 

b)5a-(a+1)=5a-a-1=4a-1

 

c)2x-(3-5-x)=2x-3+5+x = 3x+2

 

d)2a+(3a-2b)+(a+b)=2a+3a-2b+a+b = 6a-b

 

e)5a-(2-x)+b-2x+5=5a-2+x+b-2x+5 = 5a +3-x

 

f)7k-(m-2n+k)-(5k-3)=7k-m+2n-k-5k+3 = k-m+3

 

g)0,3x-(5+0,7y)-(0,9-0,1x)+(x-0,1)=0,3x-5-0,7y-0,9+0,1x-x-0,1 = -0,6x -0,7y -6

 

 

Answer 2

3b+[b+1]=3b+b+1=4b+1
5a-[a+1]=5a-a-1=4a-1
2x-[3-5-x]=2x-3+5+x=3x+2
2a+[3a-2b]+[a+b]=2a+3a-2b+a+b=6a-1b
5a-[2-x]+b-2x+5=5a-2+x+b-2x+5=5a+3-1x+b
7k-[m-2n+k]-[5k-3]=7k-m+2n-k-5k+3=1k-m+2n+3
0,3x-[5+0,7y]-[0,9-0,1x]+[x-0,1]=0,3x-5-0,7y-0,9+0,1x+x-0,1=1,4x-6-0,7y