Question

PLEASE HELP. solve the system by elimination?

Answer 1

Hint : start with the first two and multiply the second one by -1 to eliminate x.

Answer 2

what

Answer 3

Ed is suggesting you multiply the second equation by -1 and then add the first two equations together. The x terms will sum to zero. You can also sum the first and last equations eliminating x. That would leave you two equations with two variables. Is that making sense?

Answer 4

THIS IS SO HARD YOU GUYS

Answer 5

No worries, let's take it one step at a time okay? I'll help you.

Answer 6

Take the first expression and add it to the second expression (after multiplying each term in the second expression by -1 to change their sign)
-2x +2y + 3z = 0
+( 2x + y - z= 3)
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what do you get?

Answer 7

do u still need help? @veganbee

Answer 8

@helpme1.2 yeah lol.

Answer 9

After you add the two expressions above you get 3y + 2z = 3. Does that make sense? Note the x terms add to zero.

Answer 10

We can do the same adding the first and last expressions

-2x +2y + 3z = 0
+ 2x +3y + 3z = 5
____________________
5y + 6z = 5

Now we have two equations with two variables:
3y + 2z = 3
5y + 6z = 5

Can you solve two equations with two variables? You could use elimination or substitution.