1.(3/8-2/3+1/4)x(-48) 2.(1-3x+4y)-5(2y-x+1)
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1.(3/8-2/3+1/4)x(-48) 2.(1-3x+4y)-5(2y-x+1)
1.(3/8-2/3+1/4)x(-48) 2.(1-3x+4y)-5(2y-x+1)
1.(3/8-2/3+1/4)x(-48) 2.(1-3x+4y)-5(2y-x+1)
1.(3/8-2/3+1/4)x(-48)
=3/8×(-48)-2/3×(-48)+1/4×(-48)
=-18+32-12
=2
2.(1-3x+4y)-5(2y-x+1)
=1-3x+4y-10y+5x-5
=2x-6y-4
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