Question

решите уравнение пж
1/4
------+2/5=1/2
3/4x-1/2
харание спосиба

Answer 1

(1/4+2/5)/(3/4 х - 1/2)=1/2
2(5/20+8/20)=3/4 х - 1/2
3/4х -1/2=13/10
3/4 х=13/10 +1/2
3/4 х=13/10+5/10
3/4 х=18/10
3/4 х=9/5
х=9/5 :3/4
х=9/5 * 4/3
х=12/5
х=2 2/5