Question

0.01x - 0.3y = 1
y = 0.1x - 2

Which of the following systems is equivalent to the given system?


x - 30y = 100 and 10y = x - 20
x - 3y = 10 and 10y = x - 20
10x - 30y = 10 and 10y = x - 20

Answer 1

Try multiplying your equations by 10, see what you get,

If that doesn't work, try 100

Failing that, try 1000