Question

2(lg25/lgX)-3(lg5x/lg2)=1

Answer 1

2(lg25/lgX)-3(lg5x/lg2)=1

换底公式2(log25X)-3(log5 2)=1

log5X-3log5 2=1

log5X-log5 8=1

log5(X/8)=log5 5

X/8=5

X=40