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Question

Solve for x:
1x1+2x2=3x3

A
112
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B
116
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C
215
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D
219
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Solution

The correct option is A 112
1x1+2x2=3x3
1x1+2x23x3=0
1(x2)(x3)+2(x1)(x3)3(x1)(x2)(x1)(x2)(x3)=0
1(x23x2x+6)+2(x23xx+3)3(x22xx+2)=0
x23x2x+6+2x26x2x+63x2+6x+3x6=0
4x=6
x=64
x=32
x=112

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