Question

responda por fvr essas questões

Answer 1

a)

x+3 = 5
x= 5-3
x = 2

x-y = 2
2-y =2
-y=2-2
y= 0

b)

x+y = 4
x= 4-y

3x-2y = 2
3(4-y) - 2y = 2
12 - 3y - 2y = 2
12 - 5y = 2
-5y = 2-12
-5y = -10
y= -10/-5
y= 2

x= 4-y
x= 4-2
x= 2