Question

4(0.8 x-0.25y)-0.7(2x-y) если x=0.2 y=-0.6

Answer 1

4(0,16 + 0,15) - 0,7(0,8) = 1,24 - 0,56 = 0,68

Answer 2

$4*(0,8x-0,25y)-0,7(2x-y)=3,2x-y-1,4x+0,7y= \\ 1,8x-0,3y \\ при x=0,2 y=-0,6 \\ 1,8*0,2-0,3*(-0,6)=0,36+0,18=0,54$