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dusty
 3 years ago
Solve using two different methods. Explain which method you found to be more efficient.
a.) 3x9y=3
6x3y=24
dusty
 3 years ago
Solve using two different methods. Explain which method you found to be more efficient. a.) 3x9y=3 6x3y=24

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hba
 3 years ago
Best ResponseYou've already chosen the best response.1We can use two methods 1Substitution 2Elimination.

hba
 3 years ago
Best ResponseYou've already chosen the best response.1@dusty Do you know how to do these methods ?

dusty
 3 years ago
Best ResponseYou've already chosen the best response.0no i don't really. Will you explain it to me?

hba
 3 years ago
Best ResponseYou've already chosen the best response.1Sure thing. lets take an example first.

hba
 3 years ago
Best ResponseYou've already chosen the best response.1Elimination method: When adding two equations, you basically add all parts of them. Say you had the equations: 4x + 5y = 14 4x  3y = 10 Adding them would give 2y = 4 4x + 5y = 14 + 4x  3y = 10 2y = 4 As you can see, the 4x and 4x cancelled out, therefore eliminating the variable x, leaving an equation with only one variable (y), able to be solved. 2y = 4 y = 2 Now that you have a value for y, you must find one for x. To do this, just substitute the value for y into either original equation, and solve it for x 4x + 5(2) = 14 4x + 10 = 14 4x = 4 x = 1 Your solution for these two equations is (1, 2).

hba
 3 years ago
Best ResponseYou've already chosen the best response.1x + y = 4, and 2x + y = 7. First you work in one equation, solving for one variable in terms of another. Let's solve for y in terms of x in the first equation (you can do whichever variable in whichever equation you want, but you should experiment, and start recognizing which is the simplest one). x + y = 4 x x y = 4  x Now this is where the substitution comes in. We substitute this value for y in the second equation. 2x + y = 7 2x + (4  x) = 7 2x + 4  x = 7 Combine like terms... x + 4 = 7 4 4 x = 3 Now you've solved for one variable, x, but you still need y. So...substitute your value for x into either equation and solve that linear equation to find y. x + y = 4 3 + y = 4 3 3 y = 1 The solution to this equation is x = 3, y = 1.

hba
 3 years ago
Best ResponseYou've already chosen the best response.1@dusty Source:Tripod If you want a step by step solution i will solve it for you.

dusty
 3 years ago
Best ResponseYou've already chosen the best response.0Its okay I think i get it (: thanks alot!!
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