∵x+2y=3,
∴2x+4y+1=2(x+2y)+1
=2×3+1=7.
故答案为:7.
已知代数式x+2y的值是3,则代数式2x+4y+1的值是_.
已知代数式x+2y的值是3,则代数式2x+4y+1的值是______.
数学人气:171 ℃时间:2019-09-11 12:21:21
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