![c=[(3+6+9+...+300):303]-40 \\\\ c=[3(1+2+3+...+100):303]-40 \\\\ c=[3*\frac{(1+100)*100}{2}:303]-40 \\\\ c=(3*101*50:303)-40 \\\\ c=(303*50:303)-40 \\\\ c=50-40 \\\\ \boxed{c=10}](/tpl/images/0212/6435/9667e.png)
 
Solve : 5a-3(b+c)+145: 5-8 if :
3a-2b=b-2a+3c and c=[(3+6+9++300): 303]-40 ....
Mathematics, 30.08.2019 18:30 ezrabridger49
Solve : 5a-3(b+c)+145: 5-8 if :
3a-2b=b-2a+3c and c=[(3+6+9++300): 303]-40 .
Answers: 1
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