问题
填空题
方程3X=7.2的解是______,那么2X+3.5=______.
答案
3X=7.2,
X=7.2÷3,
X=2.4;
则2X+3.5,
=2×2.4+3.5,
=4.8+3.5,
=8.3.
故答案为:2.4,8.3.
方程3X=7.2的解是______,那么2X+3.5=______.
3X=7.2,
X=7.2÷3,
X=2.4;
则2X+3.5,
=2×2.4+3.5,
=4.8+3.5,
=8.3.
故答案为:2.4,8.3.