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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?
 one year ago
 one year ago
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?
 one year ago
 one year ago

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jazyBest 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
 one year ago

jazyBest ResponseYou've already chosen the best response.0
Which number is it asking you to find? The first or the second?
 one year ago

krissywattsBest ResponseYou've already chosen the best response.1
I have to get numbers for both
 one year ago

jazyBest 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
 one year ago

jazyBest ResponseYou've already chosen the best response.0
When you combine 5.5 + 0.75y + 2y = 0 you'll get the value of y.
 one year ago

jazyBest 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
 one year ago

krissywattsBest ResponseYou've already chosen the best response.1
and for x i get 4 is this all correct?
 one year ago

jazyBest ResponseYou've already chosen the best response.0
Yep your're right!:D No problem:)
 one year ago
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