Saturday

April 18, 2015

April 18, 2015

Posted by **Cam** on Wednesday, March 20, 2013 at 11:28am.

2x-3y=16

5x+2y=21

- College Math -
**Steve**, Wednesday, March 20, 2013 at 11:50amsubstitution is a method, not a problem (though it appears to be a problem for you! :-)

taking the first equation, solve for x or y:

x = (16+3y)/2

now "substitute" that into the other equation

5(16+3y)/2 + 2y = 21

80+15y + 4y = 42

19y = -38

y = -2

so, x = (16-6)/2 = 5

check that (5,-2) fits both original equations, just to be sure

**Answer this Question**

**Related Questions**

college algebra - Please help in solving this problem using the method of ...

math/algebra - I need help solving the linear system using substitution of the ...

Algebra 2 - i need help solving the problem 3x+y=-1 2x+3y=18 using substitution

Math - I need help solving this using U- Substitution (x^2-4)^2 + (x^2-4) -6=0

Math - I need help solving this using the substitution method 4p-2q= 16, 5p + 7q...

fractions - my teacher gave us some fraction problems for homework, but I'm ...

math - What strategy did you use in solving this problem? 22. Suppose that you ...

Algabra - I need help solving this using U- Substitution (x^2-4)^2 + (x^2-4) -6=...

algebra 1 - I was just wondering if anybody could explain to me the steps in '...

algebra one - I need help with solving for y and x, for example in a problem ...