Question

Afla nr. necunoscut:
1) 10×3×9-30:3:10+11=7×a
2) (607-299):b+298=607-231
3) 1×2×3×4-5+6=7×8-(9+10)-c
VA ROG URGENT DAU COROANA!!​

Answer 1

Răspuns:

10x3x9-30:3:10+11=7xa

30x9-10:10+11=7xa

270-1+11=7xa

269+11=7xa

280=7xa

a=280:7

a=40