Question

Find the solution to the following system using substitution or elimination: 5x+y=20 y=5x

Answer 1

x=2 and y=10

Explanation:

5x+y=20 ------ (a)

y=5x ----------- (b)

substituting the value of y from (b) in (a),

5x+5x=20

10x=20

x=2

from eq (b)

y=5x

y=5.2

y=10