#1**0 **

Solve the following system:

{2 + 4 x + 8 y = -8 + 7 x + 7 y | (equation 1)

-6 + 11 x + 15 y = 180 | (equation 2)

Express the system in standard form:

{-(3 x) + y = -10 | (equation 1)

11 x + 15 y = 186 | (equation 2)

Swap equation 1 with equation 2:

{11 x + 15 y = 186 | (equation 1)

-(3 x) + y = -10 | (equation 2)

Add 3/11 × (equation 1) to equation 2:

{11 x + 15 y = 186 | (equation 1)

0 x+(56 y)/11 = 448/11 | (equation 2)

Multiply equation 2 by 11/56:

{11 x + 15 y = 186 | (equation 1)

0 x+y = 8 | (equation 2)

Subtract 15 × (equation 2) from equation 1:

{11 x+0 y = 66 | (equation 1)

0 x+y = 8 | (equation 2)

Divide equation 1 by 11:

{x+0 y = 6 | (equation 1)

0 x+y = 8 | (equation 2)

**x = 6 and y = 8**

Guest Oct 3, 2017