a) 10 = x + 9
-x = -9 - 10
-x = -1 .(-1)
x = 1
b) 3x = 15
x = 15/3
x = 5
c) 2x = 14
x = 14/2
x = 7
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a) 10 = x + 9
-x = -9 - 10
-x = -1 .(-1)
x = 1
b) 3x = 15
x = 15/3
x = 5
c) 2x = 14
x = 14/2
x = 7