2x - 1/2 x = 99
1.5 x = 99
x = 99 / 1.5 = 66
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4: whose double is 8 and quarter is 1. If the missing number is x, then: 2x = x/4 + 7 Multiply throughout by 4: 8x = x + 28 Subtract x from both sides: 7x = 28 Divide throughout by 7: x = 4
The units digit of a two digit number exceeds twice the tens digit by 1. Find the number if the sum of its digits is 10.
18 and 38
18 and 38
Find a four digit number whose digits will be reversed when multiplied by nine?