siemka pomozcie 3(a-8)-(5-2a) a=0,5 4(x-y)-(-x+y) x= 3/4 y= -1 Z góry dzięki

3*0,5-3*8-(5-2*0,5)= =1,5-24-(5-1)= =1,5-24+4= =28-1,5= =13

3a-5-5-3a=0,5 3a-3a=0,5+5+5 a=10,5 4x-4y+2x-y=3/4y-1 6x-5y=3/4y-1 6x-75%5y=-1 6x-1.25y=-1