Question

201 задание 1 пример плииз!)

Answer 1

$0,8(3a-14)-0,6(6a-8)=2,4a-11,2-3,6a+4,8=-1,2a-6,4$

$a=- 3frac{1}{12}$

$(- frac{12}{10}* (-frac{37}{12}))-6,4=3,7-6,4=-2,7$