a) para x=5, quanto vale y?
b)para x= -6 quanto vale y?
c) para x= -1/2 quanto vale y?
d)para que valor de x se tem y= -15?
a) y = 1 - 2x
y = 1 - 2.5
y = 1 - 10
y = -9
b) y = 1 - 2 . (-6)
y = 1 + 12
y = 13
c) y = 1 - 2 . (-1/2 )
y = 1 + 2/2
y = 1 + 1
y = 2
d) -15 = 1 - 2x
1 - 2x = -15
- 2x = -15 - 1
- 2x = -16 ( -1 )
2x = 16
x = 16/2
x = 8
a)y=1-2.5
y=1-10
y=-9
b)y=1-2.(-6)
y=1+12
y=13
c)y=1-2.(-1/2)
y=1+2/2
y=1+1
y=2
d) -15=1-2x
-2x=1+15
2x= -16
x= -16/2
x= -8
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Verified answer
a) y = 1 - 2x
y = 1 - 2.5
y = 1 - 10
y = -9
b) y = 1 - 2 . (-6)
y = 1 + 12
y = 13
c) y = 1 - 2 . (-1/2 )
y = 1 + 2/2
y = 1 + 1
y = 2
d) -15 = 1 - 2x
1 - 2x = -15
- 2x = -15 - 1
- 2x = -16 ( -1 )
2x = 16
x = 16/2
x = 8
a)y=1-2.5
y=1-10
y=-9
b)y=1-2.(-6)
y=1+12
y=13
c)y=1-2.(-1/2)
y=1+2/2
y=1+1
y=2
d) -15=1-2x
-2x=1+15
2x= -16
x= -16/2
x= -8