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This equation is of the form ax2 + bx + c = 0 (where a = 1, b = -8 and c = 15). To help solve it, find two numbers that add to give the value of b (the 'sum') and also when multiplied togeth...
Firstly, you need to consider the type of problem we are dealing with. This is actually just a tree diagram type question. note that the sweets are not replaced.
Letting n = number of swe...
1) 2x + 3y = 6
2) 3x + 2y = 5
We can either use substitution or elimination.
Using elimination:
Multiply equation 1) by 3 and multiply equation 2...
6x+4y=16, 6x+15y=-6
11y=-22
y=-2
3x=8+4=12 x=4
x=4, y=-2
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