Question

Mim ajudem por favor ponto pra prova

Answer 1

2-b
(2x - y) + (x + y) = 3 + 3
3x = 6
x = 6/3
x = 2

x+y = 3
2+y=3
y = 3 - 2
Y = 1

3-d
2x+2.(1-3x)=1
2x+2-6x+1
2x-6x=1-2
-4x=1x.(-1)
4x=1
x=1/4

y=1-3.(1/4)
y+1-0,75=1/4
y=1/4

4-b

-4x=-2
x=-2/4
x=1/2

2(1/2) -5y =0
2/2-5y=0
1-5y=0
-5y=0
-5y=0-1
-5y=-1
y=1/5