286,140 views
40 votes
40 votes
Solve each system of equations using linear combination.1.3x +5y = 82x - 5y = 22

User Brian Hoover
by
2.6k points

1 Answer

23 votes
23 votes
Answer:

x = 6, y = -2

Explanations:

The given system of equations is:

3x + 5y = 8..................................(1)

2x - 5y = 22................................(2)

Add equations (1) and (2) together

(3x + 5y) + (2x - 5y) = 8 + 22

3x + 2x + 5y - 5y = 30

5x = 30

x = 30/5

x = 6

Substitute x = 6 into equation (1)

3x + 5y = 8

3(6) + 5y = 8

18 + 5y = 8

5y = 8 - 18

5y = -10

y = -10/5

y = -2

The solution to the system of equations is:

x = 6, y = -2

User An Hoa
by
2.7k points