Multiply every term by 33 (LCM of the denominators)
13*3*11 = 11x + 105*3
105 = 5*7*3
13*3*11 - 5*7*3*3 = 11x
factoring 3 out
3 (13*11 - 5*7*3) = 11x
3(143 - 105) = 11x
38*3 = 11x
x = 114/11 ~ 10
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Hung up on problem
Source: Beat The GMAT — Problem Solving |
13 = x/3 + 105/11
You can think of 105/11 as 9 + 6/11. This will make the numbers smaller once you subtract
3 5/11 = x/3
38/11 =x/3 no canceling up, down left or right.
11x = 114
x = 114/11
You can think of 105/11 as 9 + 6/11. This will make the numbers smaller once you subtract
3 5/11 = x/3
38/11 =x/3 no canceling up, down left or right.
11x = 114
x = 114/11
















