✨ Best Answer ✨
3(4x-y)-(2x-5y)
= 12x-3y-2x+5y
= 12x-2x-3y+5y
= 10x+2y
x=4/5、y=-2を代入して、
10×4/5+2×(-2)
= 8-4
= 4
間違えてたらすみません🙇♀️
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