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3 years ago

7

What are x,y, and z if x+y+4z=5, -2x+2z, 3x+y+2z=-1, i am desperate

1 answer:

natulia [17]3 years ago

6 0

Answer:

how I learned it in school was that the variable had to always equal something, so you would have to put on the side or where ever x=(a number) and also you multiply those numbers cause no sign would mean multiply (I'm so sorry if it's not write though, I hope I could help you a little)

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(3a2 + 2ab + 2b) + (5a2 − 3ab + 9)

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Step-by-step explanation:

$\tt{(3 {a}^{2} + 2ab + 2b) + (5 {a}^{2} - 3ab + 9})$

~While adding , the sign of each term of second expression remains same. So, Remove the unnecessary parentheses :

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~Like terms are those which have the same base. Combine the like terms :

⤑ $\tt{3 {a}^{2} + 5 {a}^{2} + 2ab - 3ab + 2b + 9}$

⤑ $\sf{8 {a}^{2} - ab + 2b + 9}$

$\red{ \boxed{ \boxed{ \tt{ ⟿ Our \: final \: answer : 8 {a}^{2} - ab + 2b + 9}}}}$

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