Question

calcule os sistema a seguir
A] X+y= 208
x=3y

B] x+y=175
x-y=43

Answer 1

{x + y = 208
{x = 3y

3y + y = 208
4y = 208
y = 52

x = 3.52 = 156


{x + y = 175
{x - y = 43

x = 43 + y

43 + y + y = 175
2y = 175 - 43
2y = 132
y = 66

x = 43 + 66 = 109