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Question

1111x+12+11x+12+111x+12+11x+12=x36, then x is equal to

A
70
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B
72
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C
36
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D
68
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Solution

The correct option is D 70
1111x+12+11x+12+111x+12+11x+12=x36

111x+22x++1x+22x+11x+22x++1x+22x=x36

112xx+2+2xx+2+12xx+2+2xx+2=x36

114xx+2+14xx+2=x36

1x+24x+x+24x=x36

12(x+2)4x=x36

4x2(x+2)=x36

2x(x+2)=x36

x2+2x=72x

x2=70

x=70

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