Question

Aflați pe a din:
[(80×a-20×11)÷5+84÷4]×7=175
Vreau rezolvarea intreaga si repede
DAU COROANĂ

Answer 1

[(80×a-20×11)÷5+84÷4]×7=175

 [(80a-220)/5+21]*7=175
   ($\frac{80a-220}{5}$+21)*7=175
7(16a-44)+147=175
112a-161=175
112a=175+161
112a=336
a=336/112
a=3