Question

22. Află termenul necunoscut:
a) 7/5-(8/5-x)=2/5
b) 8/3+4/3-(x+3/3)=8/3
c) 2/5+[2/5+(2/5-x)]-1/5=3/5

Answer 1

a. 7/5-(8/5-x)=2/5
8/5-x=S
S=7/5-2/5
S=5/5
8/5-x=5/5
x=8/5-5/5
x=3/5
b. 8/3+4/3-(x+3/3)=8/3
12/3-(x+3/3)=8/3
x+3/3=S
S=12/3-8/3
S=4/3
x+3/3=4/3
x=4/3-3/3
x=1/3
c. 2/5+[2/5+(2/5-x)]-1/5=3/5
2/5+[2/5+(2/5-x)]=3/5+1/5
2/5+[2/5+(2/5-x)]=4/5
[2/5+(2/5-x)]=S
S=4/5-2/5
S=2/5
2/5+(2/5-x)=2/5
(2/5-x)=S
S=2/5-2/5
S=0/5
2/5-x=0/5
x=2/5-0/5
x=2/5
Sper ca te-am ajutat,spor la teme!