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2010-02-05T14:00:23+01:00
A) 9 + 5x = 18
5x = 9
x = 9/5

b) 10 - 2x = 8
2x = 2
x = 1

c) x + 6 = 8x
7x = 6
x = 6/7

d) x - 4 = 30
x = 34
1 3 1
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2010-02-05T14:02:14+01:00
A)
9 + 5x = 18
5x = 18 - 6
5x = 9 /:5
x = ⁹/₅ = 1⅘

b)
10 - 2x = 8
-2x = 8 - 10
-2x = -2 /:(-2)
x = 1

c)
x + 6 = 8x
x - 8x = - 6
-7x = -6 /:(-7)
x = ⁶/₇

d)
x + (-4) = 30
x = 30 + 4
x = 34
1 4 1
2010-02-05T14:03:12+01:00
A)
9+5x=18
5x = 18 -9
5x = 9/5
x = 1,8

b)
10-2x=8
-2x = 8 - 10
-2x = -2/-2
x = 1

c)
x+6=8X
6 = 8x - x
6 = 7x /7
x = 6/7

d)
x + (-4) = 30
x = 30 + 4
x = 34
1 5 1