Question
Determine the value of a − b given that a + 3b = 18a
and 3a + b = 30 .Solution
Given: a + 3b = 18 ..... (I) And 3a + b = 30 ....... (II) On subtracting equation (I) from equation (II) , we have; 2a - 2b = 12 So, a - b = 6 Hence, option b.
If x2 – xy + y2 = 16 and x4 + x2y2 + y4 = 320 then find x2 + xy + y2...
If [2a + (1/2a)] = 5, then find the value of [4a² + (1/4a²) - 6]
When 732 is divided by a positive integer x, the remainder is 12. How many values of x are there?
If x = 15, find x5 - 16x4 + 16x3 - 16x2 + 16x - 16 = ?
The roots of the quadratic equation x² + px + q = 0 are in the ratio 3:4. If the sum and product of the roots are 7 and 12, respectively, find the valu...
Solve: 1/x + 1/y = 5/2 and 1/x – 1/y = 1/6
A boat covers 540 km upstream and downstream in 't' time. If the speed of the stream is 8 km/h and the speed of the boat is 10 km/h then find the value ...
If 2x + 4y - 9 = 0, then find the value of 8x 3 Â - 723 + 64y 3 Â + 216xy.
Solve for x in the equation: 3(x + 2) + 2(2x - 5) = 5x + 9
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