Question

2.4x-2×1.05=2.7的解

Answer 1

2.4x-2.1=2.7
2.4x=2.7+2.1
2.4x=4.8
x=4.8÷2.4
x=2

Answer 2

x²=64+x²-8x+16
8x=80
x=10a²(a+1)+(a+1)=0
(a+1)(a²+1)=0
a²+1=0无解
所以贺明a=-1(k-1)/4-(2-k)/3=2
两禅差告庆顷边乘12
3k-3-8+4k=24
7k=35
k=5