Question

no sistema x+y=3 2x-y=3v o valor do x é?

Answer 1

x + y = 3
y = 3-x

2x-y = 3
2x - 3-x = 3
x-3 = 3
x = 3+3
x= 6

y = 3-x
y= 3-6
y= -3