Question

a=? b=? c=? b=2a c=a+b+20 a+b+c=500

Answer 1

Răspuns:

Explicație pas cu pas:

b = 2a

c = a + b + 20 = a + 2a + 20 = 3a + 20

a + b + c = 500

a + 2a + 3a + 20 = 500

6a = 500 - 20 = 480

a = 480 : 6 = 80

b = 2 x 80 = 160

c = 3 x 80 + 20 = 240 + 20 = 260

Answer 2

c=a+b+20 => c=a +2a + 20 =>c=3a +20.

a + 2a +3a +20 = 500=> 6a+20 = 500 => 6a = 480 => a=80

b=160

c=80 +160 +20 => c=260