Question

{7u+2v=1
{17u+6v=−9
System of equation
Please Explain

Answer 1

Answer: u = 3 and v = -10

Explanation:

Multiply 7u + 2v = 1 by -3, you will get -21u -6v = -3

Then use the elimination method to solve.

-21u + 17u + 6v - 6v = -3 - 9

u = 3

You can take one of the original equations and replace u with the answer.

7 (3) + 2v = 1

21 + 2v = 1

v = -10

Answer 2

u= -3 v=11

Explanation:

7u+2v=1 17u+6v=-9

-3(7u+2v=1)= -21u-6v=-3

-21u-6v=-3 + 17u+6v=-9 = -4u= -12

u=-3

7(-3)+2v=1

-21+2v=1

2v=22

v=11