当a+3b/a-b=4时,求代数式2(a+3b)/a-b+3(a-b)/a+3b

问题描述:

当a+3b/a-b=4时,求代数式2(a+3b)/a-b+3(a-b)/a+3b

2(a+3b)/a-b+3(a-b)/a+3b
=2*4+3/4
=8+3/4
=35/4