如果M+2.1=3，那么4M+5.3等于多少？

Question

如题所述

Answer 1

M+2.1=3，这说明M=0.9.将M=0.9代入到4M+5.3=4×0.9+5.3=3.6+5.3=8.9。
望采纳！谢谢。

Answer 2

M +2.1=3
M =3-2.1
M =0.9
这是求出M的值，下面带入
………………………
4M +5.3
=4×0.9+5.3
=3.6+5.3
=8.9
答：4M+5.3等于8.9本回答被网友采纳

Answer 3

根据题意可得下列算式:
M+2.1=3
M=3-2.1
M=0.9
把M=0.9代入算式4M+5.3
4M+5.3=4x0.9+5.3追答

不好意思，未答完自动提交了。4M+5.3=4x0.9+5.3=8.9

Answer 4

M＝3-2.1＝0.9
4M+5.3＝4×0.9+5.3 ＝3.6+5.3=8.9

Answer 5

M +2.1=3
M =3-2.1
M =0.9
4M +5.3
=4×0.9+5.3
=3.6+5.3
=8.9