9x-2y=-21
2x+3y=16 (what is the answer)

Solving using substitution

Here is our set of equations.



First, get one of the variables along on one side in both equations.



Then, get the same value of that variable in both equations.
(You could divide by 9 and 2 in each equation, for instance.
Here I am multiplying by 2 and 9 because it is easier to work with whole numbers.)



Set the right side of each equation equal to one another.



Solve for y.



Use this value in one of our equations to find x.

It equals 1373.5 that’s the solution