Eric has been donating books he no longer needs to his local library. After 3 months of donating, he had 157 books left in his r
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Answer:
Step-by-step explanation:
Step-by-step explanation:
There are two commonly recognized beginner methods to solve a system of equations. The first is elimination and the second is substitution. I will go over both of them here.
Substitution:
Elimination:
This method is a bit hard to explain without visual aid, but I'll try my best :)
In elimination you can subtract each value with a common variable from its counterpart in the other equation. For this example, subtract y-y to get 0, -2x - (-5x) to get 3x, and -9 - (-21) to get 12.
Thus,
Hope it helps and lmk if you need more help <3 :D