Question

Ecuație cl. 6 în mulțimea Q:
CORANAÂ+11PUNCTE+MULTUMESC+5STELE

.$4 \frac{3}{4} - \frac{7}{10}x= 2x+ 2 \frac{2}{7}$

Answer 1

3-7x/10=2x+4/7 3-4/7=2x+7x/10 (21-4)/7=(20x+7x)/10 17/7=27x/10 170=189x x=170/189 X=0.89

Answer 2

4 3/4 - 7x/10 =2x+2 2/7
se introduc intregii in fractie
4 3/4 = (4×4+3)/4 =19/4
2 2/7 = (2×7+2)/7 =16/7
19/4-7x/10=2x+16/7    se aduc la acelasi numitor   care e 4×5×7=140
19×35-7x ×14=2x×140+16×20
665-98x=280x+320
378x=345
x=345/378=115/126=0,9(126984)