2(x + 3)= 5? x + 3 = 2½ x = -½
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The number is 7.
10: 3n = 2(n + 5); 3n = 2n + 10; (subtract 2n from each side) n = 10.
The sum of the sum and difference gives twice the larger number 14 + 4 = 18 → the larger number is 18 ÷ 2 = 9 The difference of the sum and the difference gives twice the smaller number 14 - 4 = 10 → the smaller number is 10 ÷ 2 = 5 → The two numbers are 9 and 5.
It is the sum of the whole number part and the fractional part. eg 5 2/3 = 5 + 2/3
5x + 6