Question

срочно решите пж да 15 б​

Answer 1

Ответ:

1/4x-3/7y=1/4*8-3/7*(-14) =1/2-(-6) =6,5

2/3x+4/5y=2/3*9+4/5*(-10) =6+(-8) =-2

a-3b/a+3b=4-3(-2)/4+3(-2) =10/-2=-5

a+3c/2a-c=3+3(-1)/2*3-(-1) =0/7=0