问题
填空题
如果5X+3的值是24,那么0.5X+15=______.
答案
5x+3=24,
5x+3-3=24-3,
5x÷5=21÷5,
x=4.2;
当x=4.2,0.5x+15=0.5×4.2+15=17.1;
故答案为:17.1.
如果5X+3的值是24,那么0.5X+15=______.
5x+3=24,
5x+3-3=24-3,
5x÷5=21÷5,
x=4.2;
当x=4.2,0.5x+15=0.5×4.2+15=17.1;
故答案为:17.1.