Question

Решите уравнения : ( х+70) *4 = 328; 560:(х+9)=56; (85х+765):170=98; (х-13581):709= 306

Answer 1

( х + 70 ) * 4 = 328
х + 70 = 328 : 4
х + 70 = 82
х = 82 - 70
х = 12

560 : ( х + 9 ) = 56
х + 9 = 560 : 56
х + 9 = 10
х = 10 - 9
х = 1