Question

18x+28y=600
x+y=25
solve by subititution

Answer 1

x = 1

y = 15

Explanation:

a) 18x + 28y = 600

b) x + y = 25

b) x = 25 - y

a) 18 (25-y) + 28y = 600

a) 450 - 18y + 28y = 600

a) 10y = 600 - 450

a) y = 150/10

y = 15

b) x + 15 = 25

x = 25 - 15

x = 10