解方程:4:5t=2:(3t-1)

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解方程:4:5t=2:(3t-1)解方程:4:5t=2:(3t-1)解方程:4:5t=2:(3t-1)4:5t=2:(3t-1)5t*2=4*(3t-1)10t=12t-4t=2内项积等于外项积所以2

解方程:4:5t=2:(3t-1)
解方程:4:5t=2:(3t-1)

解方程:4:5t=2:(3t-1)
4:5t=2:(3t-1)
5t*2=4*(3t-1)
10t=12t-4
t=2

内项积等于外项积
所以2×5t=4(3t-1)
10t=12t-4
12t-10t=4
2t=4
t=4÷2
t=2

4*(3t-1)=2*5t
12t-4=10t
12t-10t=4
2t=4
t=2

4:5t = 2:(3t - 1)
4(3t - 1) = 2×5t
12t - 4 = 10t
12t - 10t = 4
2t = 4
t = 2

t=2