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Kamau, Wasike and Omollo sell newspapers. One day Omollo sold 20 newspapers more than Wasike who sold 10 newspapers more than Kamau. The total number of newspapers they sold that day was 140. If Wasike sold y newspapers, which one of the following equations can be used to find the number of newspapers sold by Wasike?
A. 3y+10=140
B. 3y+30=140
C. 3y+20=140
D. y+30=140