Question

已知x=2t+3,y=3t-1 1.用x的代数式表示y 2.用含y的代数式表示x

Answer 1

x=2t+3

t=(x-3)/2

带入

y=3t-1 1

得

y=3(x-3)/2-11

=3x/2-31/2

y=3t-1 1

t=(y+11)/3

带入x=2t+3

x=2(y+11)/3+3

=2y/3+31/3