(x+ 5/12)-9/20=11/15. ( x+4/25)-21/50=34/75. помогите срочно

1) х=11/15+9/20-5/12; х=44/60+27/60-25/60; х=(44+27-25)/60; х=46/60= 23/30. 2)х=34/75+21/50-4/25; х=68/150+63/150-24/150; х=(68+63-24)/150; х=107/150;