问题
填空题
如果4x+3=51,那么3x+4=______.
答案
4x+3=51,
4x+3-3=51-3,
4x=48,
4x÷4=48÷4,
x=12,
3×12+4,
=36+4,
=40.
故应填:40.
如果4x+3=51,那么3x+4=______.
4x+3=51,
4x+3-3=51-3,
4x=48,
4x÷4=48÷4,
x=12,
3×12+4,
=36+4,
=40.
故应填:40.