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Anonymous
5 x 4 is 20
6 x 5 is 30
There fore 20+30=50
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4
It is (5 and minus1).
5x+6-2x=-5-x 3x+6=-5-x 4x=-11 x=11/-4
(x + 4) + (x + 5) = 2x + 9
3x+5=4-2x+6 5x=4-1 5x=3 x=3/5