Question

3. Calculați triplul sumei numerelor a, b, c din egalităţile: (a-100): 2 = 220 (b +30) 5 = 1000 . (c.3) 5=1500​

Answer 1

(a-100):2=220
a-100=220:2
a-100=110
a=110+100
a=210

(b+30) x 5=1000
b+30=1000:5
b+30=200
b=200-30
b=170

(c x 3) x 5=1500
c x 3=1500:5
c x 3=300
c=300:3
c=100

(210+170+100) x 3=480 x 3=1440