How do you work out this equation solve simultaneous equations by substitution
9x - 2y = -1
2y = 3x - 5

x is equal to negative one, and y is equal to negative four.

Step-by-step explanation:

You can do this by solving one of the equations by either x or y, then substituting it into the other.  Let's solve the second one for y:

Now we'll substitute that into the first equation:

So we now know that x is equal to -1.  We can simply substitute that into one of the original equations to find y:

We now know that x is equal to -1, and y is equal to -4.  We can also check our answer by plugging that -4 into the other equation, and see if we still get -1:

So we know that our answer is correct.

what is a pre-existing condition claus?

means if you're already damaged some way when you take out a medical insurance you will not get full compensation for that injury that you already have.

answer:     true

step-by-step explanation: