Question

a+b=700 b+c=500 a+c=800 Cat este a,b,c rezolvare pentru clasa a3a

Answer 1

a+b    =700
    b+c=500
a+    c=800
_____________
2a+2b+2c=700+500+800
2a+2b+2c=2000
2(a+b+c)=2000
a+b+c=2000/2

a+b+c=1000
700 + c = 1000
c = 1000-700
c = 300

a+500 = 100
a = 1000- 500
a = 500

500+b+300=1000
b=1000-500-300
b=200

Answer 2

700+500+800=2000 (2a+2b+2c)
2000:2=1000 (a +b +c)
1000-700=300 (c)
1000-500=500 (a)
1000-800=200 (b)