Integer format.
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2x - 10 =30 2x -10 = 30 +10 +10 2x = 40 /2 /2 x = 20
The factors of 20 are 1, 2, 4, 5, 10, and 20.The factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30.The factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40, 80The gcf of 20, 30, and 80 is 10.
4*2-2=6 6*2-2=10
To get equivalent fractions of 10, multiply 10/1 by 2/2, 3/3, 4/4,...therefore:Equivalent fractions of 10 = 20/2, 30/3, 40/4,...
20: 1, 2, 4, 5, 10, 20 30: 1, 2, 3, 5, 6, 10, 15, 30