Question

2x+y=10
x-3y=15

porfavor me ajude

Answer 1

y = 10-2x

x-3y= 15
x-3(10-2x) = 15
x-30+6x= 15
x+6x= 15+30
7x= 45
x = 45/7

y = 10-2.45/7
y = 10-90/7
y = 70-90/7
y = -20/7

(45/7, -20/7)