Question

найти корень уравнения -27х=72,5=-0,2х-5,2-3у=7+у

Answer 1

1) (17/26+11/13)*17/6=(17/26+22/26)
*17/6=39/26=3/2*17/6=1/2*17/2=17/4=4.25
/2=17/4=4.25
2)7/х-5=2
7)х=2+5
7/х=7
х=7/7
х=1