Solve the following equations:
a. 3(x – 2) = 15
b. 3m – 2(2m – 5) = 2m – 8
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Answer:
a. 3x - 6 = 15
x = 21/3
= 7
b. 6m² - 4m - 15m + 10 = 2m - 8
6m² - 19m + 10 = 2m - 8
6m² - 21m + 18 = 0
6m² - 12m - 9m + 18 = 0
6m( m - 2 ) - 9( m - 2 ) = 0
6m - 9 = 0
m = 1.5
m-2 = 0
m= 2
Thus, m= 1.5 or 2
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