When solving by substitution, we will first set one equation equal to a variable, and then plug that value into the second equation as the variable. Here is what I mean;

x - 2y = 1

3x - 6y = 3

x = 1 + 2y

3x - 6y = 3

3(1 + 2y) - 6y = 3

3 + 6y - 6y = 3

3 = 3

[] Oh no! This doesn't work well. Let's graph it and see what is happening;

-> See attached

-> I have made the lines very thick so you can see the overlap, they are the same size in reality

The answer is all solutions because the graphs are exactly the same.

Have a nice day!

I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.

- Heather

8 0

3 years ago

What is 1.8 divided by 12.06 equal

aalyn [17]

Your answer rounded to the nearest hundredths is 0.15.
You can find this by converting the decimals into fractions, then multiplying by the reciprocal of the second fraction. Finally, convert it to decimal form.

8 0

3 years ago

Which expression is positive? b a + 0 -2 2

MaRussiya [10]

Answer:

here, "a" is negative number, greater than -2

-2 < a < 0

so, -a - 1 is positive....

i hope it helped. ....

3 0

3 years ago