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4.2x10x10x10x10x(t-9)=4.2x10x10x10x20x(t-40)=4.2x10x10x10x6x(100-t)这个方程怎么解?

题目详情
4.2x10x10x10x10x(t-9)=4.2x10x10x10x20x(t-40)=4.2x10x10x10x6x(100-t)这个方程怎么解?
▼优质解答
答案和解析
4.2x10x10x10x10x(t-9)=4.2x10x10x10x20x(t-40)>
4.2x10x10x10x10x(t-9)=4.2x10x10x10x10x2x(t-40)>
t-9=2x(t-40)=2t-80>
0=2t-80-t+9>
t=71