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krissywatts
Group Title
use a system of equations in two variables solve the following problem: 4 times a first number decreased by 3 times a second number is 22. The sum between the first number and twice the second number is 0. Find the number?
 2 years ago
 2 years ago
krissywatts Group Title
use a system of equations in two variables solve the following problem: 4 times a first number decreased by 3 times a second number is 22. The sum between the first number and twice the second number is 0. Find the number?
 2 years ago
 2 years ago

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jazy Group TitleBest ResponseYou've already chosen the best response.0
first number = x second number = y so you have the equations: 4x  3y = 22 x + 2y = 0
 2 years ago

jazy Group TitleBest ResponseYou've already chosen the best response.0
Which number is it asking you to find? The first or the second?
 2 years ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.1
I have to get numbers for both
 2 years ago

jazy Group TitleBest ResponseYou've already chosen the best response.0
Ok then lets solve for x first: 4x  3y = 22 +3y 4x = 22 + 3y /4 x = 5.5 + 0.75y Now substitute the value of x into the second equation: x + 2y = 0 (5.5 + 0.75y) + 2y = 0 Now you combine the like terms: 5.5 + 0.75y + 2y = 0
 2 years ago

jazy Group TitleBest ResponseYou've already chosen the best response.0
When you combine 5.5 + 0.75y + 2y = 0 you'll get the value of y.
 2 years ago

jazy Group TitleBest ResponseYou've already chosen the best response.0
So what do you get when you solve fore y in: 5.5 + 0.75y + 2y = 0
 2 years ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.1
I get 2
 2 years ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.1
and for x i get 4 is this all correct?
 2 years ago

krissywatts Group TitleBest ResponseYou've already chosen the best response.1
Thanks you if so.
 2 years ago

jazy Group TitleBest ResponseYou've already chosen the best response.0
Yep your're right!:D No problem:)
 2 years ago
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