Question

8x+3y=5
7x-6y=1,5 por el método de sustitución

Answer 1

8x + 3y = 5 => 3y = 5 - 8x => y = (5 - 8x)/3
Sustitución en y: 7x - 6[(5 - 8x)/3]
7x - (30 - 48x)/3 = (21x - 30 + 48x)/3 = 69x - 30 => 69x = 30 => x = 30/69 => x = 10/23
y = [5 - 8(10/23)]/3 => y = (5 - 80/23)/3 => y = [(115-80)/23]/3 => y = (35/23)/3 => y = 105/23