若2x+1=8,则4x+1的值为?
问题描述:
若2x+1=8,则4x+1的值为?
答
2x + 1 = 8
2x = 8 - 1
2x = 7
4x = 7×2
4x = 14
4x + 1 = 14 + 1
4x + 1 = 15