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- Simplification and evaluation of mathematics problems in grade one of junior high school
Simplification and evaluation of mathematics problems in grade one of junior high school
Solution: (3xy+10y)+[5x-(2xy+2y-3x)] = 3xy+10y+5x-2xy-2y+3x.
=xy+8x+8y
=xy+8(x+y)
Substituting the known xy=2 and x+y=3, it is obtained.
=2+8*3=26
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