Consider this system of equations, which has one solution 2x+2y=181
0.1x+7y=78

here are some equivalent systems. each one is a step in solving the original system.

step 1:
7x+7y=630
0.1x+7y=78

step2:
6.9x=552
0.1x+7y=78

step 3
x=80
0.1x+7y=78

question 1: what was done to the original system to get the system in step 1?

look at the system in step 1 and the system in step 2

question 2: what was done to the system in step 1 to get the system in step 2?

explain why the system in step 2 shares a solution with that in step 1?

what is the solution to the original system?

nice work who answer this first