计算方程组s=2(t-9)+3(t-5),s=(t+3)/2-(t+2)/3

问题描述:

计算方程组s=2(t-9)+3(t-5),s=(t+3)/2-(t+2)/3
拜托了,答得好我一定加分,过程要详细.

s=2(t-9)+3(t-5) (1)
s=(t+3)/2-(t+2)/3 (2)
化简(1)得:
s=5t-33 带入(2)得:
5t-33=(t+3)/2-(t+2)/3
解t=7
则s=2