Monday

March 30, 2015

March 30, 2015

Posted by **anonymous** on Thursday, April 17, 2008 at 6:07pm.

4p-2q= 16,

5p + 7q= 1

- Math -
**amanda**, Thursday, April 17, 2008 at 6:15pm19-7-5=

- Math -
**PsyDAG**, Thursday, April 17, 2008 at 7:56pmStart with one formula.

4p - 2q = 16

Get one variable alone on one side of the equation.

-2q = 16 - 4p

q = 2p - 8

Then substitute the value into the other equation.

5p + 7q = 1

5p + 7(2p - 8)= 1

Solve for p.

Once you find p, put that value into the first equation to solve for q. To check, put both values back into the second equation.

I hope this helps. Thanks for asking.

- Math -
**Damon**, Thursday, April 17, 2008 at 8:07pm4 p = 16 + 2 q

so

p = (4 + .5 q)

substitute that value for p in the second equation

5 (4 + .5 q) + 7 q = 1

20 + 2.5 q + 7 q = 1

9.5 q = -19

q = -190/95 = -38/19 =-2

put that back in either first or second equation to solve for p

p = 4 + .5*(-2)

p = 4 - 1 = 3

check

4(3) -2 (-2) = 12 + 4 = 16 check

5(3) + 7(-2) = 15 - 14 = 1 check

**Answer this Question**

**Related Questions**

Algebra - Solving system of linear equations by using the apropiate method name ...

Math - 1. Explain the advantages and disadvantages of both the substitution ...

MATH - Solving by graphing DQ 1 Solving by substitution Solving by elimination ...

Math Question - Hi, I need help with a math question. Thank you to whoever helps...

Math help - I need help solving each equation by the substitution method. 1. X=...

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

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

Algebra 1 - bobpursey, In this problem you helped me with earlier: Solve using ...

College Math - I need help solving these problems by using the substitution ...

Algerbra 1 substitution method - im really confused about this question: 2x-3y=...