Question

(7x+16):11+8/12=19991/19991

/-дробная черта

Answer 1

(7х+16):11+2/3=1
(7х+16):11=1 - 2/3
(7х+16):11=1/3
7х+16=1/3:11=1/3*1/11
7х+16=1/33
7х=1/33-16
7х=15 32/33
х=15 32/33 : 7=15 32/33 * 1/7
х=75 2/7