Question

Find the solution to the following system by substitution.

5x+ y=30
y=5x

A.(0,30)
B.(6,30)
C.(3,15)
D.(6,0)

Answer 1

The answer to your question is C

Answer 2

c

Explanation:

plug in 5x for y to get 5x+5x=30. combine to get 10x=30. divide by 10 on both sides to get x=3. sub that in for x. we know that y=5x, so if we plug in 3 for x, you get 5*3=y. 5*3 is 15, so y=15. the solution is (3,15) which is c