方程(2t-5)/3+(3-2t)/5=3怎么解?急.速度、、越快越好.
问题描述:
方程(2t-5)/3+(3-2t)/5=3怎么解?急.速度、、越快越好.
答
两边同时乘以 15 得:
5(2t - 5) + 3(3 - 2t) = 45
10t - 25 + 9 - 6t = 45
10t - 6t = 45 + 25 - 9
4t = 61
t = 61÷4
t = 15.25